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Journal articles on the topic 'NH2 group'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Jancik, Vojtech, Leslie W. Pineda, Jiri Pinkas, et al. "Preparation of Monomeric[LAl(NH2)2]—A Main-Group Metal Diamide Containing Two Terminal NH2 Groups." Angewandte Chemie International Edition 43, no. 16 (2004): 2142–45. http://dx.doi.org/10.1002/anie.200353541.

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2

Jancik, Vojtech, Leslie W. Pineda, Jiri Pinkas, et al. "Preparation of Monomeric[LAl(NH2)2]—A Main-Group Metal Diamide Containing Two Terminal NH2 Groups." Angewandte Chemie 116, no. 16 (2004): 2194–97. http://dx.doi.org/10.1002/ange.200353541.

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3

Ye, Peng, Xin Ping Wang, Zhu Ping Han, Jie Yang, and Rong Bing Wan. "Lipase Immobilization on Functional Group Controlled Surfaces." Advanced Materials Research 441 (January 2012): 452–56. http://dx.doi.org/10.4028/www.scientific.net/amr.441.452.

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A simple means was demonstrated to control the functional group on surface and use this surface as a model support to investigate the effect of surface chemistry on lipase adsorption and its activity. It was based on mixing polystyrene (PS) solution with small molecular weight functional group-terminated polystyrenes (PS-Fs, functional groups such as-CH3, -CF3, -NH2, -COOH and-OH) and casting them on glass plates to fabricate the functional group controlled surfaces. The amount of adsorbed lipase on the surface with similar functional group density was-CH3> PS > -CF3> -NH2> -COOH &

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4

Li, Jun Hua, Dan Zhang, and Qi Jian Zhang. "Effective Method for Preparation of Surface NH₂-Functionalized SBA-15 Mesoporous Silica." Advanced Materials Research 465 (February 2012): 204–9. http://dx.doi.org/10.4028/www.scientific.net/amr.465.204.

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Surface NH2-functionalized SBA-15 mesoporous silica was synthesized using toluene diisocyanate (TDI) as bridge molecule. Firstly, surface Si-OH of SBA-15 reacted with one –NCO group of TDI molecular. Then, another unreacted –NCO group of TDI molecular reacted with one -NH2 group of ethylenediamine (EDA). Finally, NH2- group was successfully grafted on mesoporous SBA-15 surface by the above two step method. XRD, N2 adsorption/desorption analysis, FTIR and 29Si MAS NMR were used to identify the well-ordered structure and the successful incorporation of -NH2 on the surface of the synthesized mate

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5

Yoshpe, Besancon I., D. Auriol, F. Paul, P. Monsan, JC Gripon, and Dumas B. Ribadeau. "Reversible enzymic protection of the alpha‐amino group of amino acid derivatives using an aminopeptidase A." Biotechnology and Applied Biochemistry 18, no. 1 (1993): 93–102. http://dx.doi.org/10.1111/j.1470-8744.1993.tb00257.x.

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In previous papers we have reported that an aminopeptidase A (EC 3.4.11.7) purified from Staphylococcus chromogenes was able to catalyse the introduction of L‐malic acid at the N‐terminus of Tyr and Phe derivatives. We now show that this enzyme can be used for selective alpha‐amino protection of derivatives of probably all amino acids, except Gly and Pro, by the malyl group. The following L‐malyl derivatives were synthesized in thermodynamically controlled reactions with yields ranging from 4 to 47%: L‐malyl‐Tyr‐OEt, ‐ALA‐OMe, ‐Ser‐OEt, ‐Lys‐OEt, ‐Phe‐OMe, ‐Met‐NH2, ‐Glu‐MH2, Arg‐NH2, ‐Tye‐NH2

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6

Jezuita, Anna, Paweł A. Wieczorkiewicz, Tadeusz M. Krygowski, and Halina Szatylowicz. "Influence of the Solvent on the Stability of Aminopurine Tautomers and Properties of the Amino Group." Molecules 28, no. 7 (2023): 2993. http://dx.doi.org/10.3390/molecules28072993.

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Amino derivatives of purine (2-, 6-, 8-, and N-NH2) have found many applications in biochemistry. This paper presents the results of a systematic computational study of the substituent and solvent effects in these systems. The issues considered are the electron-donating properties of NH2, its geometry, π-electron delocalization in purine rings and tautomeric stability. Calculations were performed in ten environments, with 1 < ε < 109, using the polarizable continuum model of solvation. Electron-donating properties were quantitatively described by cSAR (charge of the substituent active re

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7

Yousatit, Satit, Witsarut Rungruangwattanachot, Natthakit Yuwawanitchakorn, Sakdinun Nuntang, Patiparn Punyapalakul, and Chawalit Ngamcharussrivichai. "Amine-Functionalized Natural Rubber/Mesostructured Silica Nanocomposites for Adsorptive Removal of Clofibric Acid in Aqueous Phase." Molecules 28, no. 5 (2023): 2330. http://dx.doi.org/10.3390/molecules28052330.

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This study is the first report on the synthesis, characterization and application of amine-functionalized mesoporous nanocomposites based on natural rubber (NR) and wormhole-like mesostructured silica (WMS). In comparison with amine-functionalized WMS (WMS-NH2), a series of NR/WMS-NH2 composites were synthesized via an in situ sol-gel method in which the organo-amine group was grafted onto the nanocomposite surface via co-condensation with 3-aminopropyltrimethoxysilane (APS) as the amine-functional group precursor. The NR/WMS-NH2 materials had a high specific surface area (115–492 m2 g−1) and

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8

Arnim, Henning von, Werner Massa, Alfred Zinn, and Kurt Dehnicke. "Synthese und Kristallstruktur des Amido-Palladats (PPh4)2[Pd2Cl4(NH2)2] · CH2Cl2 und des Benzamidin-Palladats PPh4{ [Ph– C(NH2)(NH)]PdCl3} · CH3CN / Synthesis and Crystal Structure of the Amido Palladate (PPh4)2[Pd2Cl4(NH2)2] · CH2Cl2 and of the Benzamidine Palladate PPh4{[Ph—C(NH2)(NH)]PdCl3} · CH3CN." Zeitschrift für Naturforschung B 46, no. 8 (1991): 992–98. http://dx.doi.org/10.1515/znb-1991-0804.

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Orange crystals of (PPh4)2[Pd2Cl4(NH2)2] have been prepared by the reaction of (PPh4)2[Pd2Cl6] with N,N,N′-tris(trimethylsilyl)benzamidine in boiling acetonitrile in the presence of water, and orange brown crystals of PPh4{[Ph—C(NH2)(NH)]PdCl3} by the reaction of the amidinato complex PPh4[Ph—C(NSiMe3)2PdCl2] with HCl gas in acetonitrile solution. The complexes were characterized by IR spectroscopy as well as by X-ray structure determinations.(PPh4)2[Pd2Cl4(NH2)2] · CH2Cl2: Space group PĪ, Z = 1, 2784 observed unique reflections, R = 0.043. Lattice dimensions at —60 °C: a = 1053.3(4), b = 1081

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9

Radchatawin, Sasiprapa, Dhandheera Paritporndheera, Nitithorn Singkram, Nitithorn Singkral, and Sakdinun Nuntang. "Acid Dye Removal from Wastewaters using Rice Husk Ash Functionalized with Organic Amine Groups as Adsorbent." ASEAN Journal of Scientific and Technological Reports 27, no. 1 (2023): 102–10. http://dx.doi.org/10.55164/ajstr.v27i1.250741.

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The use of rice husk ash functionalized with organic amine groups (RHA-NH2) as an adsorbent for acid dye adsorption from wastewater was studied. The RHA–NH2 was synthesized successfully via the grafting method using (3-Aminopropyl)-triethoxysilane (APTES) as amine group precursors. The synthesized adsorbents were characterized by using X-ray Powder Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), N2 adsorption-desorption analysis, and Scanning Electron Microscopy (SEM). The RHA-NH2 exhibited an amorphous silica structure and possessed the organic amine group functionalized on

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10

Wang, Yiyu, Chunqing Niu, Sisi Fan, et al. "Indocyanine Green Loaded Modified Mesoporous Silica Nanoparticles as an Effective Photothermal Nanoplatform." International Journal of Molecular Sciences 21, no. 13 (2020): 4789. http://dx.doi.org/10.3390/ijms21134789.

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Photothermal therapy possesses great advantages for the treatment of drug-resistant tumors. Herein, Near Infrared (NIR)-triggered photothermal nanoparticles were developed through loading indocyanine green (ICG), a kind of NIR dye, into amino group-modified silica nanoparticles (SiO2-NH2 NPs). SiO2-NH2 NPs were prepared with immobilization of the amino groups into the framework of silica nanoparticles (SiO2 NPs) by employing (3-aminopropyl)-triethoxysilane (APTES). Before and after the modification of the amino group, the particle sizes of SiO2 NPs showed similar value, around 100 nm. ICG was

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11

Xi, Senliang, Dawei Xu, Renzeng Chen, et al. "Effect of Functional Group-Modified UiO-66 on the Dehydrogenation of Ammonia Borane." Molecules 30, no. 7 (2025): 1487. https://doi.org/10.3390/molecules30071487.

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Ammonia borane (AB) has attracted much attention in the field of solid-state hydrogen storage due to its high hydrogen storage capacity. Nanoconfinement in UiO-66 can reduce the hydrogen release temperature. In particular, terephthalic acid was used as a linker to further improve the dehydrogenation properties through the modification of -NH2, -OH, -NO2, -Br, and -F groups. The hydrogen release content of 0.5AB/UiO-66 was 1.98 wt.%, whereas the hydrogen release content of UiO-66-2OH modified by -OH groups increased to 3.85 wt.%. The non-covalent interaction results show that -NH2 and -OH prefe

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12

Tournier, Cathy, Alan J. Whitmarsh, Julie Cavanagh, Tamera Barrett, and Roger J. Davis. "The MKK7 Gene Encodes a Group of c-Jun NH2-Terminal Kinase Kinases." Molecular and Cellular Biology 19, no. 2 (1999): 1569–81. http://dx.doi.org/10.1128/mcb.19.2.1569.

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ABSTRACT The c-Jun NH2-terminal protein kinase (JNK) is a member of the mitogen-activated protein kinase (MAPK) group and is an essential component of a signaling cascade that is activated by exposure of cells to environmental stress. JNK activation is regulated by phosphorylation on both Thr and Tyr residues by a dual-specificity MAPK kinase (MAPKK). Two MAPKKs, MKK4 and MKK7, have been identified as JNK activators. Genetic studies demonstrate that MKK4 and MKK7 serve nonredundant functions as activators of JNK in vivo. We report here the molecular cloning of the gene that encodes MKK7 and de

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13

Gladysz, John A., Connor Q. Kabes, Jack H. Gunn, Maximilian A. Selbst та Reagan F. Lucas. "Syntheses of Enantiopure 1,2-Ethylenediamines with Tethered Secondary Amines of the Formula H2NCH2CH[(CH2) n NHMe]NH2 (n = 1–4) from α-Amino Acids: New Agents for Asymmetric Catalysis". Synthesis 52, № 21 (2020): 3277–85. http://dx.doi.org/10.1055/s-0040-1707146.

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Tris(hydrochloride) adducts of the title compounds are prepared from the inexpensive α-amino acids H2N(C=O)CH2CH(NH2)CO2H, HO(C=O)(CH2) n′CH(NH2)CO2H (n′ = 1, 2), and H2N(CH2)4CH(NH2)CO2H, respectively (steps/overall yield = 5/32%, 7/30%, 7/33%, 5/38%). The NH2 group that is remote from the secondary amine is installed via BH3 reduction of an amide [–(C=O)NR2] derived from an α-amino carboxylic acid. The MeNHCH2 units are introduced by BH3 reductions of alkyl carbamate [RO(C=O)NHCH2–; R = Et, t-Bu] or amide [MeHN(C=O)–] moieties.

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14

Minkwitz, R., W. Meckstroth, and H. Preut. "Kristallstruktur von Bromchlormethyleniminium-hexachloroantimonat BrClC=NH2+SbCl6-/ Crystal Structure of Bromochlorom ethyleneiminium Hexachloroantimonate BrClC = NH2+SbCl6-." Zeitschrift für Naturforschung B 48, no. 1 (1993): 19–22. http://dx.doi.org/10.1515/znb-1993-0107.

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Bromochloromethyleneiminium hexachloroantimonate BrClC = NH2+SbCl6- crystallizes in the space group P 2 l /c w ith a = 979.6(5), b = 1140.5(5), c = 2162.1(10) pm , β = 102.45(4)° and Z = 8. It is isostructural with Cl2C = NH2+SbCl6-.

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15

Wirayani, Yayuk, Maria Ulfa, and Yahmin Yahmin. "Corrosion Inhibition Efficiency Of Nicotine Based On Quantum Chemical Study." Acta Chimica Asiana 1, no. 2 (2018): 37. http://dx.doi.org/10.29303/aca.v1i2.29.

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The effect of substituents, electron donor groups (NH2, OH, CH2OH and CH3) and electron withdrawal groups (NO2, COOH, and Cl), to the efficiency of corrosion inhibition of nicotine has been studied using theoretical studies. The effect of substituents toward the efficiency of corrosion inhibition of nicotine based on quantum parameters (EHOMO, ELUMO, Egap, I, χ, dan ΔN). The efficiency of corrosion inhibition based on quantum parameters is NH2 > OH > CH2OH > CH3 > BN > Cl > COOH > NO2. The addition of electron donor group NH2 has the highest inhibitory efficiency of 99.79

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16

Riggs, NV, and L. Radom. "Ab initio Studies on Hydrazines: 1H-Pyrrol-1-amine (N-Aminopyrrole)." Australian Journal of Chemistry 41, no. 3 (1988): 397. http://dx.doi.org/10.1071/ch9880397.

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The geometries of four stationary structures of 1H-pyrrol-1-amine have been optimized with the 3-21G and 3-21G(N*) basis sets. The lowest- energy and only equilibrium structure is the 'perpendicular' CS form (4) in which a pyramidal NH2 group is bisected by the plane of the pyrrole ring. The transition structure for inversion at the NH2 group is the perpendicular C2V form (2). After zero-point vibrational -energy corrections, it lies 24.5 kJ mol-1 [3-21G(N*)] above (4). The transition structure for rotation about the N-NH2 bond is the 'parallel' CS form (3) in which a plane of symmetry bisects

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17

ABRISHAMI, M. EBRAHIMIZADEH, and V. ZAHABI. "Reinforcing graphene oxide/cement composite with NH2 functionalizing group." Bulletin of Materials Science 39, no. 4 (2016): 1073–78. http://dx.doi.org/10.1007/s12034-016-1250-7.

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18

Yu, Xiangrui, Changjiao Shang, Yunjian Cao, Jingang Cui, and Chaofan Sun. "A DFT/TD-DFT Study on the ESIPT-Type Flavonoid Derivatives with High Emission Intensity." Materials 15, no. 8 (2022): 2896. http://dx.doi.org/10.3390/ma15082896.

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To reveal the influence of different substituents on the excited-state intramolecular proton transfer (ESIPT) process and photophysical properties of 4′-N, N-dimethylamino-3-hydroxyflavone (DMA3HF), two novel molecules (DMA3HF-CN and DMA3HF-NH2) were designed by introducing the classical electron-withdrawing group cyano (-CN) and electron-donating group amino (-NH2). The three molecules in the acetonitrile phase were systematically researched by applying the density functional theory (DFT) and time-dependent DFT (TD-DFT) methods. The excited-state hydrogen bond enhancement mechanism was confir

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19

Peng, Liang, Siyan Zhou, Huijuan Song, Yahui Yang, Ming Lei, and Fang Zhou. "Enhanced Selective Removal of Cd(II) by an Amino-Functional Water-Retaining Agent Incorporating Nano Hydrous Manganese Oxide." Journal of Nanoscience and Nanotechnology 20, no. 9 (2020): 5906–15. http://dx.doi.org/10.1166/jnn.2020.18546.

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An amino-functionalized water-retaining agent (PPM40-NH2) and a water-retaining agent lacking functionalization (PPM40) were prepared to investigate their selective Cd(II) removal properties. The affinity for Cd(II) was increased after introducing the amino functional group. The SFCd/Ca of PPM40-NH2 was 3–7 fold higher than that of PPM40 although the CCa was 100–1000 times higher than that of CCd. The chelating effect of –COOH and –NH2 in PPM40-NH2 corresponded well with the selective adsorption of Cd(II), as confirmed by simulations. A seed germination experiment demonstrated that PPM40-NH2 c

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20

Yang, Yunxin, Cong Wang, Hua Zhang, et al. "Preparation of Functionalized Zr-Based MOFs and MOFs/GO for Efficient Removal of 1,3-Butadiene from Cigarette Smoke." Materials 16, no. 2 (2023): 684. http://dx.doi.org/10.3390/ma16020684.

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Removal of 1,3-butadiene from cigarette smoke plays an important role in human health and environmental protection. Herein, a series of UiO-66 X% containing different ratios of the -NH2 group was synthesized via the solvothermal method by using terephthalic acid (H2BDC) and 2-aminoterephthalic acid (NH2-BDC) as ligands. Using GO as support, a series of UiO-66-NH2/GO Y% were prepared by controlling the ratio of UiO-66-NH2 and GO. The effects of -NH2 and GO contents on the structure and composition of MOFs were investigated. Finally, the different -NH2 contents of UiO-66 X% and the different GO

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21

Jiang, Zhou, Jiqing Ye, Jingyi Yang, Jian Wang, Lee Jia, and Rodney JY Ho. "Conjugation of Phthalocyanine Photosensitizer with Poly(amidoamine) Dendrimer: Improved Solubility, Disaggregation and Photoactivity Against HepG2 Cells." Current Cancer Drug Targets 19, no. 4 (2019): 312–20. http://dx.doi.org/10.2174/1568009618666180706164046.

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Objective: To improve solubility and to reduce aggregation, ZnPcC4 was conjugated to a third-generation poly-amidoamine dendrimer with amino end group (G3-PAMAM-NH2), which acts as a novel photodynamic therapy (PDT) drug carrier system. Methods: The phthalocyanines were synthesized by construction reaction. The nano drug was obtained from the conjugation of ZnPcC4 to G3-PAMAM-NH2, using EDC and NHS as coupling agents. The ZnPcC4@G3-PAMAM-NH2 conjugation was characterized by UV-Vis and MS. The 1O2 quantum yield of ZnPcC4@G3-PAMAM-NH2 in water was measured by the chemiluminescence method. The in

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22

Jin, Victor X., Donal H. Macartney та Erwin Buncel. "α- and β-Cyclodextrin [2]rotaxanes with (diethylenetriamine)platinum(II) stoppers". Canadian Journal of Chemistry 83, № 12 (2005): 2091–97. http://dx.doi.org/10.1139/v05-226.

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A series of dinuclear platinum(II) complexes, [(dien)Pt(NH2(CH2)nNH2)Pt(dien)]Cl4 (dien = diethylenetriamine, n = 8, 9, 10, and 12) and their corresponding [2]rotaxanes with α-cyclodextrin (α-CD), [(dien)Pt{NH2(CH2)nNH2·α-CD}Pt(dien)]Cl4, have been synthesized and characterized by 1H, 13C, and 195Pt NMR spectroscopy and electrospray mass spectrometry. The rotaxanes were prepared by reacting the {NH2(CH2)nNH2·α-CD} pseudorotaxanes with [Pt(dien)]Cl, to stopper the included linear α,ω-diaminoalkane chains with the inert Pt(II) end groups. The kinetics of the self-assembly and dissociation of the

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23

Malova, E. A., I. A. Pyshnaya, M. I. Meschaninova, and D. V. Pyshnyi. "Adaptation of a protocol for the automated solid-phase phosphoramidite synthesis of oligodeoxyribonucleotides for the preparation of their <i>N</i>-unsubstituted phosphoramidate analogues (P-NH<sub>2</sub>)." Биоорганическая химия 50, no. 6 (2024): 789–805. https://doi.org/10.31857/s0132342324060065.

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A new approach to the automated synthesis of N-unsubstituted phosphoramidate oligodeoxyribonucleotides (P-NH2) based on an optimized solid-phase phosphoramidite protocol using the Staudinger reaction has been proposed. The rapid and efficient oxidation of model P(III)-containing phosphite triethers by the organic azide (9H-fluoren-9-yl)methylcarbonylazide (FmocN3) to the corresponding phosphamides –(OPO(OR)(NFmoc))–, where R is a residue of nucleoside or alkyl nature, has been demonstrated. Removal of the alkaline-labile fluorenyl group from the modified internucleoside linkage allows the prod

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24

A, Haydar, Mohammad Salim, and Hassan H. Abdallah. "Theoretical Study for the [2+2] Cycloaddition Reaction Mechanism of Ketenes and their Derivatives." Oriental Journal Of Chemistry 35, no. 5 (2019): 1550–56. http://dx.doi.org/10.13005/ojc/350512.

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This study presents the intramolecular [2+2] cycloaddition reaction of ketenes to form cyclobutanones using B3LYP-D3/6-311++G(d,p) level of approximation. The concerted mechanism path was studied in detail. The structures of all intermediates and transition states were located using same level of theory. The influences of the substituents (-H, -CH3, -NH2, -F, -OH and –CN) were also discussed. The analysis of stationary points and the energetic parameters indicates that the substituted ketene with –CN group has the highest activation energy; however, ketene with –NH2 group has the lowest one. C

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25

Grottel, M., M. Szafrański, and Z. Pająk. "NMR Study of Cation Motion in Guanidinium Iodoplumbates." Zeitschrift für Naturforschung A 52, no. 11 (1997): 783–88. http://dx.doi.org/10.1515/zna-1997-1105.

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Abstract Proton NMR second moments and spin-lattice relaxation times of polycrystalline C(NH2)3PbI3 and [C(NH2)3]2PbI4 were studied in a wide temperature range. The order-disorder character of the existing solid-solid phase transitions was confirmed and for tetraiodoplumbate a new phase transition at 170 K was discovered. For both compounds a dynamical inequivalence and unusual high mobility of the guanidinium cations were revealed. For the reorientations discovered (NH2 group flipping, C3 in-plane reorientation and a tumbling) the activation parameters were determined.

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26

Mangmee, Suthee, Onrapak Reamtong, Thareerat Kalambaheti, Sittiruk Roytrakul, and Piengchan Sonthayanon. "Antimicrobial Peptide Modifications against Clinically Isolated Antibiotic-Resistant Salmonella." Molecules 26, no. 15 (2021): 4654. http://dx.doi.org/10.3390/molecules26154654.

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Antimicrobial peptides are promising molecules to address the global antibiotic resistance problem, however, optimization to achieve favorable potency and safety is required. Here, a peptide-template modification approach was employed to design physicochemical variants based on net charge, hydrophobicity, enantiomer, and terminal group. All variants of the scorpion venom peptide BmKn-2 with amphipathic α-helical cationic structure exhibited an increased antibacterial potency when evaluated against multidrug-resistant Salmonella isolates at a MIC range of 4–8 µM. They revealed antibiofilm activ

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27

Journal, Baghdad Science. "Sizing and Thermal Stability of Prepared Tetraaminophthalocyaninatocopper(II) Derivatives-grafted Polymers." Baghdad Science Journal 13, no. 2 (2016): 221–34. http://dx.doi.org/10.21123/bsj.13.2.221-234.

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Different polymers were prepared by condensation polymerization of sebacic anhydride and adipic anhydride with ethylene glycol and poly(ethylene glycol). Their number average molecular weights were determined by end group analysis. Then, they were grafted on the prepared phthalocyaninatocopper(II) compounds with the general formula (NH2)4PcCu(II) having amino groups of 3,3',3'',3'''- or 4,4',4'',4'''- positions. All prepared polymers, compounds, and phthalocyaninatocopper(II)-grafted polymers were characterized by FTIR. The sizing measurements were carried out in 3,3',3'',3'''- (NH2)4PcCu(II)

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Huang, Ziqi, and Lijun Liang. "The effect of functional group of Graphene-based woven filter on the desalination performance." Journal of Physics: Conference Series 2879, no. 1 (2024): 012015. http://dx.doi.org/10.1088/1742-6596/2879/1/012015.

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Abstract Graphene-based braided filter membranes (GWFM) are becoming increasingly crucial in seawater desalination because of their excellent performance, moving from research to practical use and helping to tackle water scarcity. However, the mechanisms associated with GWFMs functionalized by functional groups are unclear. This paper demonstrates that graphene strips are intricately integrated into a filtration membrane characterized by X-functional groups (GWFM-X). Molecular dynamics (MD) simulations are effective for calculating water flux, assessing salt discharge effects, and understandin

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Ci, Li-qian, Zhi-gang Huang, Feng-mei Lv, et al. "Enhanced Delivery of Imatinib into Vaginal Mucosa via a New Positively Charged Nanocrystal-Loaded in Situ Hydrogel Formulation for Treatment of Cervical Cancer." Pharmaceutics 11, no. 1 (2019): 15. http://dx.doi.org/10.3390/pharmaceutics11010015.

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The present study was carried out to investigate the potential of cationic functionalization on imatinib nanocrystals to improve the mucoadhesiveness and, thus, delivery to the lesion of cervicovaginal tumors. Amino-group-functionalized imatinib nanocrystals (NC@PDA-NH2) were prepared with near-spheroid shape, nanoscale size distribution, positive zeta potential, and relatively high drug content with the aid of the polydopamine-coating technique. Efficient interaction between NC@PDA-NH2 and mucin was proven by mucin adsorption which was related to the positive zeta-potential value of NC@PDA-NH

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Roecker, L., JD Lydon, AC Willis, AM Sargeson, and E. Deutsch. "Intramolecular Quadridentate Synthesis: X-Ray Crystallographic Analysis of [(NH2CH2CH2NH2)Co(NH2(CH2)2N = C(NH2)CH2S(CH2)2NH2)](CF3SO3)3.H2O." Australian Journal of Chemistry 42, no. 3 (1989): 339. http://dx.doi.org/10.1071/ch9890339.

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Meridional forms of N3S quadridentate complexes of the type [(en)Co(NH2(CH2)2 N=C(R′)CH2S(CH2)2NH2)]3+ with R′ = CH3 and NH2) are readily prepared from [(en)2Co(S(R)CH2CH2 NH2)]3+ (with R = CH2COCH3 and CH2CN, respectively; en = ethane-1,2-diamine) in basic solution. The X-ray crystallographic analysis of the complex with R1= NH2 was determined as the monohydrate of its triflate salt and shown to have a β-type configuration of the quadridentate. Crystals are monoclinic, space group C2/c with a 23.337(1), b 11.973(1), c 20.015(1) � , β 95.12(1)�, and Z 8. 3183 data with 1 ≥ 3 σ (1) were refined

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SAIDO-SAKANAKA, Hisako, Jun ISHIBASHI, Aki SAGISAKA, Eiichi MOMOTANI, and Minoru YAMAKAWA. "Synthesis and characterization of bactericidal oligopeptides designed on the basis of an insect anti-bacterial peptide." Biochemical Journal 338, no. 1 (1999): 29–33. http://dx.doi.org/10.1042/bj3380029.

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Defensin from a beetle, Allomyrina dichotoma, is known to have anti-bacterial activity against Gram-positive bacteria. This peptide, which comprises 43 amino acid residues, was effective against methicillin-resistant Staphylococcus aureus. We identified the active site of beetle defensin by measuring anti-bacterial activity against S. aureus of 64 overlapping 12-mer peptides with either a free carboxylate or a free amide group at their C-termini. An LCAAHCLAIGRR-NH2 (19L–30R-NH2) fragment showed the greatest activity of the synthetic oligopeptides. The 19L–30R-NH2 fragment was effective agains

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Ju, Mingjie, Feirong Gong, Shujun Cheng та Yun Gao. "Fast and Convenient Synthesis of Amine-Terminated Polylactide as a Macroinitiator forω-Benzyloxycarbonyl-L-Lysine-N-Carboxyanhydrides". International Journal of Polymer Science 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/381076.

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Amine-terminated poly (L-lactide) (NH2-PLLA) with various chain lengths were successfully synthesized by sequential tert-butyl-N-(3-hydroxypropyl) carbamate initiated bulk ring-opening polymerization (ROP) of L-lactide (L-LA) in the presence of Stannous(II) 2-ethylhexanoate (Sn(Oct)2) and deprotection of theN-tert-butoxycarbonyl (Boc) group at the end of the polymer chain. The polymers obtained were characterized by FT-IR,1H NMR, and GPC method. NH2-PLLA thus prepared was used to initiate the polymerization of ω-benzyloxycarbonyl-L-lysine-N-carboxyanhydride (Lys (Z)-NCA), and the result confir

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Yambulatov, D. S., T. V. Astaf´eva, J. K. Voronina, S. A. Nikolaevskii, M. A. Kiskin, and I. L. Eremenko. "Reaction of 2,3,4,5,6-Pentafluorobenzamide with Potassium Hydride: Unexpected Activation of the C–F Bond and Dimerization of Organofluorine Ligand." Koordinacionnaâ himiâ 50, no. 6 (2024): 402–10. http://dx.doi.org/10.31857/s0132344x24060061.

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The reaction of potassium hydride with 2,3,4,5,6-pentafluorobenzamide (FBAm) in dimethoxyethane results in activation of the C–F bond in the para-position to the C(O)NH2 group followed by dimerization of FBAm to form a potassium salt with one free amide group. The structure of the binuclear reaction product {(DME)2K+[C6F5–C(O)N–C6F4–C(O)NH2]–}2 (I) was determined by X-ray diffraction (CCDC 2311402), the purity of the product was confirmed by NMR spectroscopy.

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Yambulatov, D. S., T. V. Astaf’eva, J. K. Voronina, S. A. Nikolaevskii, M. A. Kiskin, and I. L. Eremenko. "Reaction of 2,3,4,5,6-Pentafluorobenzamide with Potassium Hydride: Unexpected Activation of the C–F Bond and Dimerization of Organofluorine Ligand." Russian Journal of Coordination Chemistry 50, no. 5 (2024): 355–61. http://dx.doi.org/10.1134/s107032842460013x.

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Abstract The reaction of potassium hydride with 2,3,4,5,6-pentafluorobenzamide (FBAm) in dimethoxyethane results in activation of the C–F bond in the para-position to the C(O)NH2 group followed by dimerization of FBAm to form a potassium salt with one free amide group. The structure of the binuclear reaction product {(DME)2K+[C6F5–C(O)N–C6F4–C(O)NH2]–}2 (I) was determined by X-ray diffraction (CCDC 2311402), the purity of the product was confirmed by NMR spectroscopy.

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35

Rodríguez, Pedro, Carolina Parra, J. Noe Díaz de León, et al. "VO Supported on Functionalized CNTs for Oxidative Conversion of Furfural to Maleic Anhydride." Catalysts 14, no. 8 (2024): 510. http://dx.doi.org/10.3390/catal14080510.

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Commercial non-functionalized (CNTs) and functionalized carbon nanotubes (CNT-COOH and CNT-NH2) were used as supports to synthesize vanadium-supported catalysts to be used in the gas phase partial oxidation of furfural towards maleic anhydride (MA). The CNTs and the VO2-V2O5/CNTs, so-called VO/CNT catalysts, were characterized by AAS, TGA, XRD, N2 adsorption isotherms at −196 °C, Raman, NH3-TPD and XPS. The surface area values, TGA and XRD results indicate that the larger thermal stability and larger dispersion of vanadium species is reached for the VO/CNT-NH2 catalyst. XPS indicates presence

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36

Brankiewicz, Wioletta, Joanna Okońska, Katarzyna Serbakowska, et al. "New Peptide Based Fluconazole Conjugates with Expanded Molecular Targets." Pharmaceutics 14, no. 4 (2022): 693. http://dx.doi.org/10.3390/pharmaceutics14040693.

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Infections of Candida spp. etiology are frequently treated with azole drugs. Among azoles, the most widely used in the clinical scenario remains fluconazole (FLC). Promising results in treatment of dangerous, systemic Candida infections demonstrate the advantages of combined therapies carried out with combinations of at least two different antifungal agents. Here, we report five conjugates composed of covalently linked FLC and cell penetrating or antimicrobial peptide: TP10-7-NH2, TP10-NH2, LFcinB(2-11)-NH2, LFcinB[Nle1,11]-NH2, and HLopt2-NH2, with aspects of design, chemical synthesis and th

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37

Ovchinnikova, S. N., and T. P. Aleksandrova. "Effect of solution composition on the desorption behavior of self-assembled monolayers of alkanethiols with different terminal groups." Èlektrohimiâ 60, no. 4 (2024): 300–308. http://dx.doi.org/10.31857/s0424857024040042.

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Voltammetry and chronoamperometry are used to study the effect of the composition of a solution on the desorption behavior of self-assembled monolayers (SAMs) of alkanethiols with approximately the same chain length but different end groups of thiols (R: –CH3, –CH2OH, and –NH2). The hydrophilic properties of terminal groups for the studied thiols increase in the –CH3 –NH2 ≤ –CH2OH series. It has been found that the anion and cation compositions of electrolyte significantly affect the electrochemical stability and blocking ability of SAMs of thiols with different terminal groups. It has been es

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38

Drahoš, Bohuslav, Peter Antal, Ivan Šalitroš, and Radovan Herchel. "Magnetic Properties of Fe(II) Complexes of Cyclam Derivative with One p-Aminobenzyl Pendant Arm." Metals 10, no. 3 (2020): 366. http://dx.doi.org/10.3390/met10030366.

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In order to prepare an Fe(II) spin crossover (SCO) complex that could be consequently modified to a bimetallic coordination compound that possesses another magnetic property of interest, a specially designed ligand L-NH2 (1-(4-aminobenzyl)-4,11-bis(pyridine-2-ylmethyl)- 1,4,8,11-tetraazacyclotetradecane) was prepared. This ligand consists of a macrocyclic cyclam part containing two 2-pyridylmethyl pendant arms (expecting SCO upon Fe(II) complexation) and one p-aminobenzyl pendant arm with an NH2 group. The presence of this group enables the consequent transformation to various functional group

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Ovchinnikova, Svetlana, and Tatyana Aleksandrova. "Influence of the nature of the alkanethiol terminal group on the electrochemical stability and blocking ability of self-assembled nanofilms on Au electrode." MATEC Web of Conferences 340 (2021): 01013. http://dx.doi.org/10.1051/matecconf/202134001013.

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We studied the effect of the nature of the terminal group of thiols with the same chain length HS (CH2)8 – R (R: -CH3, -CH2OH, -NH2) on the electrodesorption behaviour of well-formed SAMs (the self-assembled monolayers), their stability and blocking ability using voltammetry and chronoamperometry. The nature of the terminal functional group determines the surface properties of SAM and provides the basis for subsequent interactions (for example, with peptides, proteins, DNA) in order to create sensors and bioagents. For the studied thiols, the hydrophilicity of the end groups increases in the s

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40

Ahmed, Eman. "Effect of NH2 Substituent Group on PC61BM Properties Using DFT." International Journal of Emerging Trends in Engineering Research 7, no. 8 (2019): 183–90. http://dx.doi.org/10.30534/ijeter/2019/13782019.

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41

Mashaly, M. M. "A study of the effect of ammonia gas on the solid mono- and dinuclear oxorhenium(V) complexes." Journal of the Serbian Chemical Society 64, no. 9 (1999): 519–31. http://dx.doi.org/10.2298/jsc9909519m.

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The reaction of ammonia gas with the solid oxorhenium(V) complexes [Re2 O3L2Cl4].2H2O, [Re2O2L3Cl6].2H2O, [ReOLCl(OH2)3]Cl2, [ReOL2(OH2)3]Cl3, [ReOLCl3(OH2)], [ReOL(SCN)2Cl(OH2)].H2O and [ReOL(SCN)Cl2(OH2)] (where L = 2-benzimadazolethione), yielded the corresponding ammine and/or amine complexes, [Re2O3L2(NH3)2(NH2)2]Cl2 (I), [Re2O2L3(NH3)2(NH2)4]Cl2(II), [Re2O3L2(NH3)2 (NH2)4].H2O (III), [Re2O3L4(NH2)4] (IV), [Re2O3L2(NH3)2(NH2)4] (V), [Re2O3L2 (SCN)4(NH3)2] (VI) and [Re2O3L2(Thio)2(NH2)4] (VII), respectively, (Thio = thiourea) where ammonia gas has replaced other ligands such as chlorine an

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42

Uhl, Werner, Thomas Abel, Jutta Kösters, and Friedhelm Rogel. "Hydrazine Adducts of Tri(tert-butyl)aluminum, -gallium and -indium – a Systematic Approach." Zeitschrift für Naturforschung B 63, no. 2 (2008): 117–23. http://dx.doi.org/10.1515/znb-2008-0201.

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Treatment of the monomeric trialkylelement compounds Al(CMe3)3, Ga(CMe3)3, and In(CMe3)3 with different hydrazines H2N-N(H)R (R=Me, CMe3, C6H5) yielded the corresponding adducts (Me3C)3E ← NH2-N(H)R, 1 to 9, in almost quantitative yields. All products were characterized by crystal structure determinations and shown to have the NH2 group of the hydrazine ligands attached to the central Group 13 atom. These adducts are excellent starting compounds for the generation of hydrazides by thermolysis with release of butane

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43

Alshehab, Abdullah, and Ali K. Ismael. "Impact of the terminal end-group on the electrical conductance in alkane linear chains." RSC Advances 13, no. 9 (2023): 5869–73. http://dx.doi.org/10.1039/d3ra00019b.

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This research presents comprehensive theoretical investigations of a series of alkane-based chains using four different terminal end groups including amine –NH2, thiomethyl –SMe, thiol –SH and direct carbon contact –C.

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Inui, A., M. Okita, T. Inoue, et al. "Effect of cholecystokinin octapeptide analogues on food intake in the dog." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 257, no. 4 (1989): R946—R951. http://dx.doi.org/10.1152/ajpregu.1989.257.4.r946.

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Cholecystokinin octapeptide, administered into the third cerebral ventricle (icv), suppresses feeding in sheep, pigs, chicken, rats, and dogs. Because of the species differences in the feeding response to cholecystokinin (CCK), we studied the pharmacological characterization of this peptide on feeding in 16-h-fasted dogs. We examined the effects of CCK-(26-33)-NH2 (CCK-8) and a variety of its analogues, nonsulfated CCK-(26-33)-NH2 (desulfated CCK-8), CCK-(26-33)-OH (deamidated CCK-8), (Nle28,31)-CCK-(26-33)-NH2 [(Nle28,31)-CCK-8], succinyl-CCK-(27-33)-NH2 (Suc-CCK-7) succinyl-Thr28, Leu29, MeP

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45

Sukhikh, Taisiya S., Dmitry S. Kolybalov, Ekaterina K. Pylova, and Sergey N. Konchenko. "Luminescent Zn Halide Complexes with 2-(2-Aminophenyl)benzothiazole Derivatives." Inorganics 10, no. 9 (2022): 138. http://dx.doi.org/10.3390/inorganics10090138.

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We report a comparative study of coordination behaviour of 2-(2-aminophenyl)benzothiazole (NH2-pbt) and its phosphorus-containing derivative, α-aminophosphine oxide (PCNH-pbt), towards zinc halides. The corresponding coordination compounds [Zn(L)2Hal2] (L = PCNH-pbt, Hal = Cl, 1 and Hal = Br, 2) and [Zn(L’)Hal2] (L’ = NH2-pbt, Hal = Cl, 3 and Hal = Br, 4) were obtained as single phases. As evidenced by single-crystal X-ray diffraction analysis, L’ ligand coordinates to Zn in a chelate manner via two N atoms. Despite a similar coordination mode in complexes 3 and 4, the spatial geometry of the

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46

Wiegand, T. W., P. B. Williams, S. C. Dreskin, M. H. Jouvin, J. P. Kinet, and D. Tasset. "High-affinity oligonucleotide ligands to human IgE inhibit binding to Fc epsilon receptor I." Journal of Immunology 157, no. 1 (1996): 221–30. http://dx.doi.org/10.4049/jimmunol.157.1.221.

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Abstract Using the systematic evolution of ligands by exponential enrichment (SELEX) method, we have identified oligonucleotides that bind to human IgE with high affinities and high specificity. These ligands were isolated from three pools of oligonucleotides, each representing 10(15) molecules: two pools contained 2'-NH2 pyrimidine-modified RNA with either 40 or 60 randomized sequence positions, and the third pool contained ssDNA with 40 randomized sequence positions. Based on sequence and structure similarities, these oligonucleotide IgE ligands were grouped into three families: 2'-NH2 RNA g

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47

Yateem, Ali Hussain. "Rotational barrier and electron-withdrawing substituent effects: Theoretical study of -conjugation in para-substituted anilines." Mediterranean Journal of Chemistry 10, no. 4 (2020): 319–34. http://dx.doi.org/10.13171/mjc02004161378ahy.

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The rotational barrier RB around C–NH2 bond between the minimum and maximum states of 84 electron-withdrawing groups at para-position in aniline were studied at the density functional wB97X-D/6-31G** level. The rotational barrier was found to correlate strongly with shortening of the C–NH2 bond, increase of flattening of NH2 group, decrease in negative natural charge on amino nitrogen, increase in minimum ionization potential around lone pair of amino nitrogen, increase in maximum (positive) electrostatic potential on amino hydrogens, increase in NH2 stretching frequencies, and increase in sta

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48

Sari, Andi Y. P., Paulina Taba, and Prastawa Budi. "Synthesis and Characterization of The MCM-48 and Modified NH2." Indonesian Journal of Chemical Research 3, no. 1 (2015): 249–53. http://dx.doi.org/10.30598/ijcr.2015.3-and.

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This research aims to synthesize and characterize MCM-48 modified with the group-NH2. Synthesis of MCM-48 and its modification by NH2 conducted by Ryoo methods where is the salt of Ludox HS40 solution mixed with NaOH solution then heated, followed by making mixture of CTAB and Triton X-100. The resulting gel mixture is heated at temperature of 100 Â°C for 24 hours. The reaction mixture added 30% acetic acid until pH 10. Then the mixture was heated at 100 Â°C for 24 hours then cooled at room temperature. MCM-48 mesoporous silica that has formed was filtered, washed with distilled water and drie

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49

Kim, Hee-Gon, Keunsu Choi, Kibong Lee, Soonjae Lee, Kyung-Won Jung, and Jae-Woo Choi. "Controlling the Structural Robustness of Zirconium-Based Metal Organic Frameworks for Efficient Adsorption on Tetracycline Antibiotics." Water 13, no. 13 (2021): 1869. http://dx.doi.org/10.3390/w13131869.

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Tetracyclines (TCs) are the most widely used antibiotics for the prevention and treatment of livestock diseases, but they are toxic to humans and have frequently been detected in water bodies. In this study, the physical and chemical properties of the zirconium-based metal organic framework (MOF) UiO-66 and its NH2-functionalized congener UiO-66-NH2 were investigated along with batch TC adsorption tests to determine the effect of functionalization on TC removal. TC removal was highest at pH 3 and decreased with increasing pH. Pseudo-1st and pseudo-2nd-order kinetic models were used to study th

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50

Jackson, W. Gregory. "Synthesis and Characterization of Simple Hydroxo- and Amido-Bridged Cobalt(III) Dinuclear Ions Missing from the Alfred Werner Collection." Australian Journal of Chemistry 62, no. 10 (2009): 1308. http://dx.doi.org/10.1071/ch09330.

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The unsymmetrical N,O-dibridging NO2– group in the threo (‘rac’) or erythro (‘meso’) isomers of [(en)2Co(μ-NH2,μ-NO2)Co(en)2]4+ is cleaved in hot triflic acid to yield a complex that is predominantly meso. This reacts in water to yield the new meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ ion. The reactions of the threo- and erythro-μ-NO2– isomers in basic (0.1 M) aqueous solution are each retentive, giving the rac- and meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ ions as products, respectively. The optically resolved erythro complex gives the achiral meso isomer, which completes the threo/rac and erythro/meso c

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