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Journal articles on the topic 'Supramolecular complexes; Host-guest chemistry'

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Published: 4 June 2021

Last updated: 2 February 2022

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1

Khan, Sadaf Bashir, and Shern-Long Lee. "Supramolecular Chemistry: Host–Guest Molecular Complexes." Molecules 26, no. 13 (2021): 3995. http://dx.doi.org/10.3390/molecules26133995.

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In recent times, researchers have emphasized practical approaches for capturing coordinated and selective guest entrap. The physisorbed nanoporous supramolecular complexes have been widely used to restrain various guest species on compact supporting surfaces. The host–guest (HG) interactions in two-dimensional (2D) permeable porous linkages are growing expeditiously due to their future applications in biocatalysis, separation technology, or nanoscale patterning. The different crystal-like nanoporous network has been acquired to enclose and trap guest molecules of various dimensions and contour

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2

Haino, Takeharu. "Supramolecular Chemistry: From Host-guest Complexes to Supramolecular Polymers." Journal of Synthetic Organic Chemistry, Japan 71, no. 11 (2013): 1172–81. http://dx.doi.org/10.5059/yukigoseikyokaishi.71.1172.

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3

Streb, Carsten, Thomas McGlone, Oliver Brücher, De-Liang Long, and Leroy Cronin. "Hybrid Host-Guest Complexes: Directing the Supramolecular Structure through Secondary Host-Guest Interactions." Chemistry - A European Journal 14, no. 29 (2008): 8861–68. http://dx.doi.org/10.1002/chem.200801247.

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4

Prabodh, Amrutha, Yichuan Wang, Stephan Sinn, et al. "Fluorescence detected circular dichroism (FDCD) for supramolecular host–guest complexes." Chemical Science 12, no. 27 (2021): 9420–31. http://dx.doi.org/10.1039/d1sc01411k.

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Fluorescence-detected circular dichroism (FDCD) spectroscopy is applied for the first time to supramolecular host–guest and host–protein systems and compared to the more known electronic circular dichroism (ECD).

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5

Suwinska, Kinga. "Intermolecular interactions in inclusion complexes." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C673. http://dx.doi.org/10.1107/s2053273314093267.

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The whole range of interactions can be found between host and guest in supramolecular assemblies from ion-ion interactions, ion-dipole interactions, dipol-dipol interactions through hydrogen bonding, cation-π interactions, π-π stacking to van der Waals forces. Additionally, the same interactions exist between the supramolecular complex and its surrounding, i.e. solvent molecules, neighboring complexes, gases, etc. Recently the interest of scientists in the field of supramolecular chemistry is focused on design and synthesis of water-soluble synthetic macrocyclic ligands which are good receptor

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Thomas, Sajesh, Rebecca Fuller, Alexandre Sobolev, et al. "Supramolecular Stark Effect in Host-Guest Complexes via Charge Density Analysis." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C674. http://dx.doi.org/10.1107/s2053273314093255.

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The effect of an electric field on the vibrational spectra, the Vibrational Stark Effect (VSE), has been utilized extensively to probe the local electric field in the active sites of enzymes [1, 2]. For this reason, the electric field and consequent polarization effects induced by a supramolecular host system upon its guest molecules attain special interest due to the implications for various biological processes. Although the host-guest chemistry of crown ether complexes and clathrates is of fundamental importance in supramolecular chemistry, many of these multicomponent systems have yet to b

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Remón, Patricia, David González, Miguel A. Romero, Nuno Basílio, and Uwe Pischel. "Chemical signal cascading in a supramolecular network." Chemical Communications 56, no. 26 (2020): 3737–40. http://dx.doi.org/10.1039/d0cc00217h.

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8

Aramoto, Hikaru, Motofumi Osaki, Subaru Konishi, et al. "Redox-responsive supramolecular polymeric networks having double-threaded inclusion complexes." Chemical Science 11, no. 17 (2020): 4322–31. http://dx.doi.org/10.1039/c9sc05589d.

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9

Xu, Bi, Xinqi Zhou, and Cliff I. Stains. "An improved miniprotein host for fluorogenic supramolecular assembly on the surface of living cells." RSC Advances 6, no. 24 (2016): 20381–85. http://dx.doi.org/10.1039/c6ra01215a.

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10

Ghazzali, Mohamed. "Supramolecular assembly in metal complexes: Two structural cases." Pure and Applied Chemistry 85, no. 2 (2013): 397–404. http://dx.doi.org/10.1351/pac-con-12-08-11.

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With the current advances in our understanding of molecular components in the solid-state world, the relation between energy and geometry remains controversial. In this study, we deliver a concise account for supramolecular chemistry, and in order to illustrate some of its concepts we describe some structural and theoretical analyses for two unique cases of our work. We elaborate on a supramolecular model of controlled “one-pot” host–guest metal-mediated self-assembly reaction inside iron coordination polymer grid architecture, and we review halogen bonding by specifically observing M–Cl···Cl–

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11

Mosinger, Jiří, Viktor Kliment, Jan Sejbal, Pavel Kubát, and Kamil Lang. "Host-guest complexes of anionic porphyrin sensitizers with cyclodextrins." Journal of Porphyrins and Phthalocyanines 06, no. 08 (2002): 514–26. http://dx.doi.org/10.1142/s1088424602000646.

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The photodynamic sensitizers zinc(II)- and palladium(II)-5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrins and 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin form 1:1 and/or 1:2 supramolecular complexes with native cyclodextrins (CD) and 2-hydroxypropyl cyclodextrins (hpCD) in aqueous neutral solutions. The formation of these assemblies causes a bathochromic shift of the porphyrin Soret band in the UV-vis spectra and a red shift of the fluorescence emission bands. The binding constants span over three orders of magnitude, from 8.1 × 102 M −1 to 5.4 × 105 M −1 (or 1.1 × 106 M −2) depending on the

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12

Barata, Patrícia D., Alexandra I. Costa, Sérgio Costa, and José V. Prata. "Fluorescent Bis-Calix[4]arene-Carbazole Conjugates: Synthesis and Inclusion Complexation Studies with Fullerenes C60 and C70." Molecules 26, no. 16 (2021): 5000. http://dx.doi.org/10.3390/molecules26165000.

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Supramolecular chemistry has become a central theme in chemical and biological sciences over the last decades. Supramolecular structures are being increasingly used in biomedical applications, particularly in devices requiring specific stimuli-responsiveness. Fullerenes, and supramolecular assemblies thereof, have gained great visibility in biomedical sciences and engineering. Sensitive and selective methods are required for the study of their inclusion in complexes in various application fields. With this in mind, two new fluorescent bis-calix[4]arene-carbazole conjugates (4 and 5) have been

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13

Xu, Weitao, Xinyu Deng, Xin Xiao, et al. "Supramolecular assemblies controlled by cucurbit[n]uril size (n = 6, 7, 8 and 10)." New Journal of Chemistry 44, no. 11 (2020): 4311–18. http://dx.doi.org/10.1039/d0nj00087f.

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The differing cavity size of the Q[n] determines the binding interactions between the benzyl substituted 4-pyrrolidinopyridinium salt and each Q[n]. Single crystal X-ray diffraction of the guest as well as two host–guest complexes is reported.

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14

D'Anna, Francesca, Carla Rizzo, Paola Vitale, Salvatore Marullo, and Francesco Ferrante. "Supramolecular complexes formed by dimethoxypillar[5]arenes and imidazolium salts: a joint experimental and computational investigation." New J. Chem. 41, no. 21 (2017): 12490–505. http://dx.doi.org/10.1039/c7nj02598j.

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The stability of host–guest complexes formed by dimethoxypillar[5]arenes and imidazolium salts has been analyzed as a function of different structural features of the guest, using a combined approach of different techniques.

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15

Prabodh, Amrutha, Stephan Sinn, Laura Grimm, et al. "Teaching indicators to unravel the kinetic features of host–guest inclusion complexes." Chemical Communications 56, no. 82 (2020): 12327–30. http://dx.doi.org/10.1039/d0cc03715j.

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Three new, practically convenient methods are introduced for measuring kinetic parameters of supramolecular host–guest and protein–ligand complexes. Combined with thermodynamic data, this allows for an in-depth of the binding mechanism.

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Kakuta, Takahiro, Yoshinori Takashima, and Akira Harada. "Highly Elastic Supramolecular Hydrogels Using Host–Guest Inclusion Complexes with Cyclodextrins." Macromolecules 46, no. 11 (2013): 4575–79. http://dx.doi.org/10.1021/ma400695p.

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17

Stuckhardt, Constantin, Diederik Roke, Wojciech Danowski, Edwin Otten, Sander J. Wezenberg, and Ben L. Feringa. "A chiral self-sorting photoresponsive coordination cage based on overcrowded alkenes." Beilstein Journal of Organic Chemistry 15 (November 15, 2019): 2767–73. http://dx.doi.org/10.3762/bjoc.15.268.

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In recent years, increasing efforts have been devoted to designing new functional stimuli-responsive supramolecular assemblies. Here, we present three isomeric supramolecular coordination complexes consisting of a Pd2L4 stoichiometry. As shown by NMR, CD and X-ray studies, as well as DFT calculations, these complexes form cage-like structures by chiral self-sorting. Photochromic ligands derived from first generation molecular motors enable light-driven interconversion between the three isomers. Two of the isomers were able to form host–guest complexes opening up new prospects toward stimuli-co

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18

Kadokawa, Jun-ichi. "Synthesis of Amylosic Supramolecular Materials by Glucan Phosphorylase-Catalyzed Enzymatic Polymerization According to the Vine-Twining Approach." Synlett 31, no. 07 (2020): 648–56. http://dx.doi.org/10.1055/s-0039-1690804.

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This article overviews the synthesis of amylosic supramolecular materials through inclusion complexation in glucan phosphorylase (GP)-catalyzed enzymatic polymerization. Amylose is a polysaccharide that is known to form inclusion complexes with a number of hydrophobic small guest molecules. A pure amylose can be synthesized by the enzymatic polymerization of α-d-glucose 1-phosphate monomer with a maltooligosaccharide primer catalyzed by GP. The author has reported that the propagating amylosic chain in the enzymatic polymerization twines around hydrophobic polymers present in aqueous reaction

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Boland, Patricia G., Sara J. Accardi, Carrie A. Snow, and Brian D. Wagner. "Investigations of the supramolecular host properties of a fluorescent bistren cage compound." Canadian Journal of Chemistry 87, no. 2 (2009): 448–52. http://dx.doi.org/10.1139/v08-179.

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The host properties of a bistren cage compound, previously reported to be an efficient anion sensor, are shown to include encapsulation of small aromatic guest molecules. It is also shown that the intrinsic fluorescence of this cage compound, arising from the anthracenyl moiety in its structure, is sensitive to the encapsulation of aromatic guests in aqueous solution and can be used to measure the binding constants for any such guest. This makes this bistren cage a rare example of a fluorescent host for aromatic guests, and suggests potential applications of this compound as a versatile fluore

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Arora, Kapildev K., and V. R. Pedireddi. "Host–guest complexes of 3,5-dinitrobenzonitrile: channels and sandwich supramolecular architectures." Tetrahedron 60, no. 4 (2004): 919–25. http://dx.doi.org/10.1016/j.tet.2003.11.028.

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21

Serillon, Dylan, Carles Bo, and Xavier Barril. "Testing automatic methods to predict free binding energy of host–guest complexes in SAMPL7 challenge." Journal of Computer-Aided Molecular Design 35, no. 2 (2021): 209–22. http://dx.doi.org/10.1007/s10822-020-00370-6.

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AbstractThe design of new host–guest complexes represents a fundamental challenge in supramolecular chemistry. At the same time, it opens new opportunities in material sciences or biotechnological applications. A computational tool capable of automatically predicting the binding free energy of any host–guest complex would be a great aid in the design of new host systems, or to identify new guest molecules for a given host. We aim to build such a platform and have used the SAMPL7 challenge to test several methods and design a specific computational pipeline. Predictions will be based on machine

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22

Pemberton, Barry C., Elango Kumarasamy, Steffen Jockusch, D. K. Srivastava, and J. Sivaguru. "Photophysical aspects of 6-methylcoumarin–cucurbit[8]uril host–guest complexes." Canadian Journal of Chemistry 89, no. 3 (2011): 310–16. http://dx.doi.org/10.1139/v10-121.

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Photophysical measurements of 6-methylcoumarin (1) encapsulated within cucurbit[8]uril (CB[8]) indicate a pronounced red shift in the fluorescence maximum with an increase in the emission quantum yield and fluorescence lifetime. In addition, at 77 K, there is observable phosphorescence upon encapsulation within CB[8]. The photophysical measurements add credibility to our previously proposed dynamic nature of the CB–coumarin complex in solution. The dynamic nature of the CB[8]–coumarin host–guest complex in water is critical to a CB acting as a supramolecular catalytic nanoreaction vessel to fa

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23

Hu, Yi-Xiong, Gui-Yuan Wu, Xu-Qing Wang, et al. "Acid-Activated Motion Switching of DB24C8 between Two Discrete Platinum(II) Metallacycles." Molecules 26, no. 3 (2021): 716. http://dx.doi.org/10.3390/molecules26030716.

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The precise operation of molecular motion for constructing complicated mechanically interlocked molecules has received considerable attention and is still an energetic field of supramolecular chemistry. Herein, we reported the construction of two tris[2]pseudorotaxanes metallacycles with acid–base controllable molecular motion through self-sorting strategy and host–guest interaction. Firstly, two hexagonal Pt(II) metallacycles M1 and M2 decorated with different host–guest recognition sites have been constructed via coordination-driven self-assembly strategy. The binding of metallacycles M1 and

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Domiński, Adrian, Tomasz Konieczny та Piotr Kurcok. "α-Cyclodextrin-Based Polypseudorotaxane Hydrogels". Materials 13, № 1 (2019): 133. http://dx.doi.org/10.3390/ma13010133.

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Supramolecular hydrogels that are based on inclusion complexes between α-cyclodextrin and (co)polymers have gained significant attention over the last decade. They are formed via dynamic noncovalent bonds, such as host–guest interactions and hydrogen bonds, between various building blocks. In contrast to typical chemical crosslinking (covalent linkages), supramolecular crosslinking is a type of physical interaction that is characterized by great flexibility and it can be used with ease to create a variety of “smart” hydrogels. Supramolecular hydrogels based on the self-assembly of polypseudoro

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Nayak, Malabika, Sohini Sarkar, Pascale Lemoine, et al. "Supramolecular Dimers of Copper(II) Complexes Resulting from Designed Host-Guest Interactions." European Journal of Inorganic Chemistry 2010, no. 5 (2010): 744–52. http://dx.doi.org/10.1002/ejic.200900857.

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26

Cohen, Yoram, Sarit Slovak, and Liat Avram. "Solution NMR of synthetic cavity containing supramolecular systems: what have we learned on and from?" Chemical Communications 57, no. 71 (2021): 8856–84. http://dx.doi.org/10.1039/d1cc02906a.

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NMR has played a pivotal role in the study of host–guest complexes and supramolecular systems. Here selected examples are used to demonstrate the impact and the added values of using multi-parametric NMR when studying such systems in solution.

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Sardaru, Monica-Cornelia, Oana Carp, Elena-Laura Ursu, et al. "Cyclodextrin Encapsulated pH Sensitive Dyes as Fluorescent Cellular Probes: Self-Aggregation and In Vitro Assessments." Molecules 25, no. 19 (2020): 4397. http://dx.doi.org/10.3390/molecules25194397.

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We have designed and synthesized a series of novel, supramolecular, long-lived fluorescent probes based on the host-guest inclusion complexes formation between fluorescent indolizinyl-pyridinium salts and β-cyclodextrin. Fluorescence and electrospray ionisation mass spectrometry experiments, supported by theoretical molecular docking studies, were utilized in the monitoring of the inclusion complexes formation, evidencing the appearance of corresponding 1:1 and 1:2 species. Additionally, the influence of the guest molecule over the aggregation processes of the cyclodextrin inclusion complexes

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Amrhein, Felix, Anke Schwarzer, and Monika Mazik. "Crystal structure of a methanol solvate of a macrocycle bearing two flexible side-arms." Acta Crystallographica Section E Crystallographic Communications 77, no. 3 (2021): 233–36. http://dx.doi.org/10.1107/s2056989021001067.

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Di-tert-butyl N,N′-{[13,15,28,30,31,33-hexaethyl-3,10,18,25,32,34-hexaazapentacyclo[25.3.1.15,8.112,16.120,23]tetratriaconta-1(31),3,5,7,9,12(33),13,15,18,20,22,24,27,29-tetradecaene-14,29-diyl]bis(methylene)}dicarbamate methanol disolvate, C52H72N8O4·2CH3OH, was found to crystallize in the space group P21/c with one half of the macrocycle (host) and one molecule of solvent (guest) in the asymmetric unit of the cell, i.e. the host molecule is located on a crystallographic symmetry center. Within the 1:2 host–guest complex, the solvent molecules are accommodated in the host cavity and held in t

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Liu, Fengbo, Hakim Karoui, Antal Rockenbauer, Simin Liu, Olivier Ouari, and David Bardelang. "EPR Spectroscopy: A Powerful Tool to Analyze Supramolecular Host•Guest Complexes of Stable Radicals with Cucurbiturils." Molecules 25, no. 4 (2020): 776. http://dx.doi.org/10.3390/molecules25040776.

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Stable organic free radicals are increasingly studied compounds due to the multiple and unusual properties imparted by the single electron(s). However, being paramagnetic, classical methods such as NMR spectroscopy can hardly be used due to relaxation and line broadening effects. EPR spectroscopy is thus better suited to get information about the immediate surroundings of the single electrons. EPR has enabled obtaining useful data in the context of host•guest chemistry, and a classical example is reported here for the stable (2,2,6,6-tetramethyl-4-oxo-piperidin-1-yl)oxyl or 4-oxo-TEMPO nitroxi

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Kawase, Takeshi, and Masaji Oda. "Complexation of carbon nanorings with fullerenes." Pure and Applied Chemistry 78, no. 4 (2006): 831–39. http://dx.doi.org/10.1351/pac200678040831.

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To explore the supramolecular properties of the hollow space of carbon nanotubes, the belt-shaped conjugated systems with sizable and deep cavities are intriguing molecules. Recently, we found that the "carbon nanorings", cyclic [6]paraphenyleneacetylene ([6]CPPA), and the related compounds involving two naphthylene rings, form stable inclusion complexes with fullerenes in solution as well as in the solid state. The stability of these complexes correlates well with the van der Waals (VDW) contact between the host and guest. Thus, carbon nanorings having a deep cavity should form considerably s

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Nicholas, James D., and Victor Chechik. "Characterization of Host–Guest Complexes of Supramolecular Self-Assembled Cages Using EPR Spectroscopy." Journal of Physical Chemistry B 124, no. 27 (2020): 5646–53. http://dx.doi.org/10.1021/acs.jpcb.0c02599.

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Xiao, Xin, Zhong-Cheng Tian, Li He, et al. "Supramolecular assemblies of host–guest complexes of cucurbit[6]uril with some organic molecules." Journal of Molecular Structure 965, no. 1-3 (2010): 109–15. http://dx.doi.org/10.1016/j.molstruc.2009.11.049.

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Bruns. "Exploring and Exploiting the Symmetry-Breaking Effect of Cyclodextrins in Mechanomolecules." Symmetry 11, no. 10 (2019): 1249. http://dx.doi.org/10.3390/sym11101249.

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Cyclodextrins (CDs) are cone-shaped molecular rings that have been widely employed in supramolecular/host–guest chemistry because of their low cost, high biocompatibility, stability, wide availability in multiple sizes, and their promiscuity for binding a range of molecular guests in water. Consequently, CD-based host–guest complexes are often employed as templates for the synthesis of mechanically bonded molecules (mechanomolecules) such as catenanes, rotaxanes, and polyrotaxanes in particular. The conical shape and cyclodirectionality of the CD “bead” gives rise to a symmetry-breaking effect

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Barton, Benita, Eric C. Hosten, and Pieter L. Pohl. "Host (–)-(2R,3R)-2,3-Dimethoxy-1,1,4,4-tetraphenylbutane-1,4-diol and Guests Aniline, N-Methylaniline, and N,N-Dimethylaniline: A Selectivity Study." Australian Journal of Chemistry 71, no. 3 (2018): 133. http://dx.doi.org/10.1071/ch17532.

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The compound (–)-(2R,3R)-2,3-dimethoxy-1,1,4,4-tetraphenylbutane-1,4-diol (DMT) forms 2 : 1 host : guest complexes with aniline, N-methylaniline, and N,N-dimethylaniline when recrystallized from these solvents. When the guests competed, as in binary and ternary mixtures, DMT proved to be remarkably selective for the alkylated guests, discriminating consistently against aniline. A host selectivity order of aniline << N-methylaniline < N,N-dimethylaniline was observed. Results from single-crystal diffraction, Hirshfeld surface, and thermal analyses were used to explain the observed pref

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Czapik, Agnieszka, Maciej Jelecki, and Marcin Kwit. "Chiral Cocrystal Solid Solutions, Molecular Complexes, and Salts of N-Triphenylacetyl-l-Tyrosine and Diamines." International Journal of Molecular Sciences 20, no. 20 (2019): 5004. http://dx.doi.org/10.3390/ijms20205004.

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The molecular recognition process and the ability to form multicomponent supramolecular systems have been investigated for the amide of triphenylacetic acid and l-tyrosine (N-triphenylacetyl-l-tyrosine, TrCOTyr). The presence of several supramolecular synthons within the same amide molecule allows the formation of various multicomponent crystals, where TrCOTyr serves as a chiral host. Isostructural crystals of solvates with methanol and ethanol and a series of binary crystalline molecular complexes with selected organic diamines (1,5-naphthyridine, quinoxaline, 4,4′-bipyridyl, and DABCO) were

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Pessêgo, Márcia, Johan Mendoza, José Paulo da Silva, Nuno Basílio, and Luis Garcia-Rio. "Unveiling the formation 1 : 2 supramolecular complexes between cucurbit[7]uril and a cationic calix[4]arene derivative." Chemical Communications 55, no. 92 (2019): 13828–31. http://dx.doi.org/10.1039/c9cc07280b.

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The formation of host–guest complexes between cucurbit[7]uril (CB7) and a tetracationic calix[4]arene derivative in the so-called cone conformation was investigated by <sup>1</sup>H NMR, DOSY NMR, isothermal titration calorimetry and ESI-MS.

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Liu, Si-Yuan, Xin-Rui Wang, Man-Ping Li, Wen-Rong Xu, and Dietmar Kuck. "Water-soluble host–guest complexes between fullerenes and a sugar-functionalized tribenzotriquinacene assembling to microspheres." Beilstein Journal of Organic Chemistry 16 (October 14, 2020): 2551–61. http://dx.doi.org/10.3762/bjoc.16.207.

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A sugar-functionalized water-soluble tribenzotriquinacene derivative bearing six glucose residues, TBTQ-(OG) 6 , was synthesized and its interaction with C60 and C70-fullerene in co-organic solvents and aqueous solution was investigated by fluorescence spectroscopy and ultraviolet-visible spectroscopy. The association stoichiometry of the complexes TBTQ-(OG) 6 with C60 and TBTQ-(OG) 6 with C70 was found to be 1:1 with binding constants of K a = (1.50 ± 0.10) × 105 M−1 and K a = (2.20 ± 0.16) × 105 M−1, respectively. The binding affinity between TBTQ-(OG) 6 and C60 was further verified by Raman

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Kost, Bartłomiej, Marek Brzeziński, Marta Socka, Małgorzata Baśko, and Tadeusz Biela. "Biocompatible Polymers Combined with Cyclodextrins: Fascinating Materials for Drug Delivery Applications." Molecules 25, no. 15 (2020): 3404. http://dx.doi.org/10.3390/molecules25153404.

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Cyclodextrins (CD) are a group of cyclic oligosaccharides with a cavity/specific structure that enables to form inclusion complexes (IC) with a variety of molecules through non-covalent host-guest interactions. By an elegant combination of CD with biocompatible, synthetic and natural polymers, different types of universal drug delivery systems with dynamic/reversible properties have been generated. This review presents the design of nano- and micro-carriers, hydrogels, and fibres based on the polymer/CD supramolecular systems highlighting their possible biomedical applications. Application of

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Kowalewska, Anna, and Maria Nowacka. "Supramolecular Interactions in Hybrid Polylactide Blends—The Structures, Mechanisms and Properties." Molecules 25, no. 15 (2020): 3351. http://dx.doi.org/10.3390/molecules25153351.

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The conformation of polylactide (PLA) chains can be adjusted by supramolecular interactions (the formation of hydrogen bonds or host-guest complexes) with appropriate organic molecules. The structures formed due to those intermolecular interactions may act as crystal nuclei in the PLA matrix (“soft templating”). In this review, the properties of several supramolecular nucleating systems based on synthetic organic nucleators (arylamides, hydrazides, and 1,3:2,4-dibenzylidene-d-sorbitol) are compared to those achieved with biobased nucleating agents (orotic acid, humic acids, fulvic acids, nanoc

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Sbârcea, Laura, Ionuț-Mihai Tănase, Adriana Ledeți та ін. "Encapsulation of Risperidone by Methylated β-Cyclodextrins: Physicochemical and Molecular Modeling Studies". Molecules 25, № 23 (2020): 5694. http://dx.doi.org/10.3390/molecules25235694.

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Risperidone (RSP) is an atypical antipsychotic drug which acts as a potent antagonist of serotonin-2 (5TH2) and dopamine-2 (D2) receptors in the brain; it is used to treat schizophrenia, behavioral and psychological symptoms of dementia and irritability associated with autism. It is a poorly water soluble benzoxazole derivative with high lipophilicity. Supramolecular adducts between drug substance and two methylated β-cyclodextrins, namely heptakis(2,6-di-O-methyl)-β-cyclodextrin (DM-β-CD) and heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin (TM-β-CD) were obtained in order to enhance RSP solubilit

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Das, Ankita, Imon Mandal, Ravindra Venkatramani, and Jyotishman Dasgupta. "Ultrafast photoactivation of C─H bonds inside water-soluble nanocages." Science Advances 5, no. 2 (2019): eaav4806. http://dx.doi.org/10.1126/sciadv.aav4806.

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Light energy absorbed by molecules can be harnessed to activate chemical bonds with extraordinary speed. However, excitation energy redistribution within various molecular degrees of freedom prohibits bond-selective chemistry. Inspired by enzymes, we devised a new photocatalytic scheme that preorganizes and polarizes target chemical bonds inside water-soluble cationic nanocavities to engineer selective functionalization. Specifically, we present a route to photoactivate weakly polarized sp3C─H bonds in water via host-guest charge transfer and control its reactivity with aerial O2. Electron-ric

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Zhou, Huchen, and John T. Groves. "Host-guest interactions of cyclodextrins and metalloporphyrins: supramolecular building blocks toward artificial heme proteins." Journal of Porphyrins and Phthalocyanines 08, no. 02 (2004): 125–40. http://dx.doi.org/10.1142/s108842460400012x.

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Cyclodextrins are versatile building blocks for a variety of macromolecules due to the inclusion complexes that are formed with hydrophobic organic molecules. Cyclodextrin-porphyrin interactions are of particular interest since cyclodextrins can serve as a non-covalent binding pocket while metalloporphyrins could serve as the heme analogs in the construction of heme protein model compounds. Various approaches to the design and assembly of biomimetic porphyrin constructs are compared and contrasted in this minireview with a particular emphasis on self-assembled and porphyrin-cyclodextrin system

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Schäfer, Christian, Björn Decker, Matthias Letzel, et al. "On the way to supramolecular photochemistry at the single-molecule level." Pure and Applied Chemistry 78, no. 12 (2006): 2247–59. http://dx.doi.org/10.1351/pac200678122247.

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Two examples of artificial supramolecular host-guest systems derived from resorc[4]arenes (calix[n]arenes based on resorcinol) and ammonium ions as guests have been studied by atomic force microscopy (AFM). For the first time, real single-molecule events have been determined for this type of supramolecular complexes and off-rates as well as molecular parameters of single-molecule aggregates such as the depths of the binding pocket (molecular length parameter) could be measured by applying the methods of dynamic force spectroscopy. In addition, this technique was also applied to differentiate b

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Maciollek, Arkadius, Helmut Ritter, and Rainer Beckert. "Superstructures of fluorescent cyclodextrin via click-reaction." Beilstein Journal of Organic Chemistry 9 (April 29, 2013): 827–31. http://dx.doi.org/10.3762/bjoc.9.94.

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Mono-(6-azido-6-deoxy)-β-cyclodextrin (CD) was covalently attached to an alkyne-modified 5-methyl-2-(pyridin-2-yl)thiazol-4-ol yielding a fluorophore containing CD in a click-type reaction. Intermolecular complexes were formed by poly(host–guest)-interactions. The supramolecular structures were characterized by 1H NMR-ROESY spectroscopy, dynamic light scattering, UV–vis spectroscopy, fluorescence spectroscopy, and asymmetric flow field-flow fractionation. By adding potassium adamantane-1-carboxylate, the thiazol dye is displaced from the CD-cavity and the elongated noncovalent polymeric struct

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Saleh, Na’il, Muna S. Bufaroosha, Ziad Moussa, Rukayat Bojesomo, Hebah Al-Amodi, and Asia Al-Ahdal. "Encapsulation of Cinnamic Acid by Cucurbit[7]uril for Enhancing Photoisomerization." Molecules 25, no. 16 (2020): 3702. http://dx.doi.org/10.3390/molecules25163702.

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Cis- or Z-configuration is required for the plant growth-promoting activity of cinnamic acid (CA), whereas the E-form is inactive. Herein, we describe the encapsulation of E-CA by cucurbit[7]uril (CB7) and show that photoisomerization reactions can be more efficiently controlled in aqueous solutions by utilizing this supramolecular approach. Measurements of UV–visible absorption and proton NMR spectra at different pH values confirm that E-CA and its methyl ester, methyl-E-cinnamate (MC), form stronger 1:1 host–guest complexes with CB7 compared to cucurbit[8]uril (CB8) or three cyclodextrins (α

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Meng, Ye, Weiwei Zhao, Jun Zheng, et al. "Host–guest modes and supramolecular frameworks of complexes of tetramethyl cucurbit[6]uril with 4-chloroaniline and 4,4′-diaminostilbene." RSC Advances 11, no. 6 (2021): 3470–75. http://dx.doi.org/10.1039/d0ra09074c.

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Two TMeQ[6]-based multi-dimensional supramolecular frameworks were formed driven by weak interaction forces in the system (hydrogen bonding, C–H... π interactions, ion–dipole interactions, and dipole–dipole interactions).

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Aitipamula, Srinivasulu, and Ashwini Nangia. "Guest-Induced Supramolecular Isomerism in Inclusion Complexes of T-Shaped Host 4,4-Bis(4′-hydroxyphenyl)cyclohexanone." Chemistry - A European Journal 11, no. 22 (2005): 6727–42. http://dx.doi.org/10.1002/chem.200500400.

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Takashima, Yoshinori, Yang Yuting, Miyuki Otsubo, Hiroyasu Yamaguchi, and Akira Harada. "Supramolecular hydrogels formed from poly(viologen) cross-linked with cyclodextrin dimers and their physical properties." Beilstein Journal of Organic Chemistry 8 (September 20, 2012): 1594–600. http://dx.doi.org/10.3762/bjoc.8.182.

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Supramolecular materials with noncovalent bonds have attracted much attention due to their exclusive properties differentiating them from materials formed solely by covalent bonds. Especially interesting are rotor molecules of topological complexes that shuttle along a polymer chain. The shuttling of these molecules should greatly improve the tension strength. Our research employs cyclodextrin (CD) as a host molecule, because CD effectively forms polyrotaxanes with polymers. Herein we report the formation of supramolecular hydrogels with an α-CD dimer (α,α-CD dimer) as a topological linker mol

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Tsuchiya, Hinako, Garry Sinawang, Taka-aki Asoh, et al. "Supramolecular Biocomposite Hydrogels Formed by Cellulose and Host–Guest Polymers Assisted by Calcium Ion Complexes." Biomacromolecules 21, no. 9 (2020): 3936–44. http://dx.doi.org/10.1021/acs.biomac.0c01095.

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Fujiwara, Shoji, Kentaro Nonaka, Mai Yamaguchi, Takeshi Hashimoto, and Takashi Hayashita. "Structural effects of ditopic azoprobe–cyclodextrin complexes on the selectivity of guest-induced supramolecular chirality." Chemical Communications 54, no. 90 (2018): 12690–93. http://dx.doi.org/10.1039/c8cc02242a.

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