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Journal articles on the topic 'Absorption-maxima'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Shulga, Sergii, and Oksana Shulga. "POLYMETHYNE DYES WITH THIAZOLO (3,2-a)PYRIMIDINE AND PYRIMIDO(2,1-b)BENZTHIAZOLE SALTS WITH A TRIFLUOROMETHYL GROUP IN THE PYRIMIDINE CYCLE." Ukrainian Chemistry Journal 89, no. 5 (2023): 26–36. http://dx.doi.org/10.33609/2708-129x.89.05.2023.26-36.

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There are synthesized various types of polymethine dyes from trifluoromethylthiazolo(3,2-a)pyrimidinium and trifluoromethylpyrimido(2,1-b)benzthiazolium perchlorates various types of polymethine dyes were obtained – styryls, monomethinecyanines, symmetrical and asymmetrical carbocyanines, merocyanines. The absorption maxima and their intensities are determined for each dye, absorption characteristics curves and elemental analysis data for Carbon, Hydrogen and Sulfur are provided. As a result of the dyes absorption maxima analysis containing a tri-fluoromethyl group in the pyrimidine ring an

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2

Dev Mahato, Kapil. "Absorption and emission maxima prediction of fluorescent organic materials using optimized neural network models." IOP Conference Series: Materials Science and Engineering 1316, no. 1 (2024): 012011. http://dx.doi.org/10.1088/1757-899x/1316/1/012011.

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Abstract The aim of the study is to predict the absorption and emission maxima from the given dataset, which consists of 3066 fluorescent organic materials. To fulfill this requirement, five optimized neural network models are employed. Out of them, the wide neural network (WNN) model outperformed the other models on validation as well as test results. The results were obtained on the basis of three evaluation parameters: mean absolute error (MAE), root mean squared error (RMSE), and the coefficient of determination (R2). According to the validation scores, the WNN was the best-predictive mode

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3

Stochmal, Anna, and Wieslaw Oleszek. "Effect of Acylation of Flavones with Hydroxycinnamic Acids on their Spectral Characteristics." Natural Product Communications 2, no. 5 (2007): 1934578X0700200. http://dx.doi.org/10.1177/1934578x0700200511.

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The absorption spectra of twenty-one flavones including glycosides of apigenin, luteolin, chrysoeriol and tricin, nonacylated or acylated with coumaric, ferulic or sinapic acids, were examined to document the influence of acylation on their spectral characteristics. Acylation did not shift the absorption maximum of band II, but the molar absorption coefficients of this band increased 1.3–2.0 fold. Acylation of apigenin and chrysoeriol glycosides did not shift the absorption maximum of band I and the absorption maxima of nonacylated and acylated compounds were at 319–334 nm, but this increased

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4

Shulga, Sergii, and Oksana Shulga. "POLYMETHYLENE DYES FROM 2-METHYLINDOLO(3,2-B)THIAZOLO(5,4-D)QUINOXALINES HAVING SUBSTITUENTS AT THE NITROGEN ATOM OF THE INDOLE RING." Ukrainian Chemistry Journal 90, no. 1 (2024): 26–35. https://doi.org/10.33609/2708-129x.90.1.2024.26-37.

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Condensation of isatin with N-methylisatin, N-ethyl, N-propyl, N-butyl, N-phenyl, N-benzoyl and 5-nitroisatin with 2-methyl 5,6-diaminobenzthiazole gave 2-methyl-indolo(3,2-b)thiazolo(5,4-d)quinoxalines with a substituted nitrogen atom in the indole ring. When they are heated with alkyltosylates, quaternary salts are formed from which various cyanine dyes are synthesized: styryls, monomethinecyanines, asymmetric carbocyanines. The absorption maxima of each dye were determined and analyzed, and the results of elemental analysis for Carbon, Hydrogen, and Sulfur were given. The influence of sub

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5

Herman, Brian. "Absorption and Emission Maxima for Common Fluorophores." Current Protocols in Cell Biology 00, no. 1 (1998): A.1E.1—A.1E.5. http://dx.doi.org/10.1002/0471143030.cba01es00.

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6

Gharibshahi, Elham, Shahidan Radiman, Ahmadreza Ashraf, Elias Saion, Leila Gharibshahi, and Sina Ashraf. "Simulation and Synthesis of Cobalt (Co) Nanoparticles by Gamma Radiation Technique." Micromachines 14, no. 7 (2023): 1383. http://dx.doi.org/10.3390/mi14071383.

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Cobalt nanoparticles were synthesized using the gamma radiolytic technique, and the particle size was found to be reduced from 12±1 to 7±1 nm by increasing the dose from 10 to 60 kGy. The UV-visible absorption spectra were measured and exhibited a steady absorption maxima at 517 nm in the UV region, which blue-shifted toward a lower wavelength with a decrease in particle size. By taking the conduction electrons of an isolated particle that are not entirely free but are instead bound to their respective quantum levels, the optical absorption of the cobalt nanoparticles can be calculated and sim

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7

Pavlyshche, N. I., A. V. Korotun, and V. P. Kurbatsky. "Optical absorption of composites with metallic nanosized spheroidal particles." Himia, Fizika ta Tehnologia Poverhni 14, no. 4 (2023): 561–68. http://dx.doi.org/10.15407/hftp14.04.561.

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The paper considers the problem of light absorption by a nanocomposite with randomly oriented metal spheroidal particles-inclusions, provided that the volume content of such inclusions is small. Expressions for the frequency dependences of the effective dielectric function and the absorption coefficient of the metal-dielectric nanocomposite are obtained within the effective medium model taking into account the axial symmetry of spheroidal inclusions. The effective relaxation rate of electrons is introduced using the kinetic approach. Numerical calculations are performed for the cases when incl

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8

Llewellyn, Ben A., E. Stephen Davies, Constance R. Pfeiffer, Mick Cooper, William Lewis, and Neil R. Champness. "Thionated perylene diimides with intense absorbance in the near-IR." Chemical Communications 52, no. 10 (2016): 2099–102. http://dx.doi.org/10.1039/c5cc09962e.

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9

Chen, P. C. "Absorption maxima study of chromophores of indigoid dyes." International Journal of Quantum Chemistry 60, no. 2 (1996): 681–87. http://dx.doi.org/10.1002/(sici)1097-461x(1996)60:2<681::aid-qua6>3.0.co;2-t.

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10

Dhammadip, C. Nandgaye, N. Daf Abhijit, Upadesh B. Lade Mr., and Durgesh W. Moharkar Mr. "The Woodward Fisher Regulation for Calculating Absorption Maxima." INTERNATIONAL JOURNAL OF PHARMACEUTICAL AND BIO-MEDICAL SCIENCE 03, no. 07 (2023): 340–44. https://doi.org/10.5281/zenodo.8162277.

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Woodward regulations are countless units of empirically derived guidelines which try to predict the wavelength of the absorption most λmax in an ultraviolet-visible spectrum of a given compound. Inpute used in the calculation are the kind of chromophores present, the auxochromes substituents on the chromophores, and solvent. Example is conjugated carbonyl compound conjugated dienes, and polyenes. One set of Woodward-fishers policies for dienes is outlined is both homoannular with each double bonds contained in one ring or heteroannular with double bonds disbursed between two rings. With

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11

Chauhan, A., P. K. Arora, R. Nagpal, et al. "NEW SENSITIVE UV SPECTROPHOTOMETRIC METHODS FOR SIMULTANEOUS ESTIMATION OF ZIDOVUDINE AND LAMIVUDINE IN FIXED DOSE COMBINATION." INDIAN DRUGS 52, no. 03 (2015): 28–33. http://dx.doi.org/10.53879/id.52.03.10091.

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Two new, simple, accurate and sensitive UV spectrophotometric methods have been developed and subsequently validated for the simultaneous estimation of zidovudine and lamivudine in a fixed dose combination. Zidovudine and lamivudine have an absorption maxima at 267.3 nm and 272.3 nm respectively. The first method is based upon the simultaneous equation and second upon the determination of Q value. The simultaneous estimation method is based upon the measurements of ratios of absorptivity and absorbance, of both the components at their absorption maxima. The method of Q analysis is based on the

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12

ASADOLLAHI-BABOLI, M., and A. MANI-VARNOSFADERANI. "APPLICATION OF COMPUTATIONAL METHODS TO PREDICT ABSORPTION MAXIMA OF ORGANIC DYES USED IN SOLAR CELLS." Journal of Theoretical and Computational Chemistry 12, no. 02 (2013): 1250114. http://dx.doi.org/10.1142/s0219633612501143.

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A quantitative structure-property relationship (QSPR) study for the prediction of the absorption maxima (λmax) of organic dyes used in solar cells was carried out using different computational methods. Three-dimensional (3D) descriptors were calculated using Codessa and Dragon softwares to represent the dye molecules. Then, different chemometric tools such as multivariate adaptive regression splines (MARS) and adaptive neuro-fuzzy inference system (ANFIS) combined with Monte Carlo (MC) sampling technique were utilized for selecting the most important descriptors and predicting the absorption m

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13

Barni, E., G. Viscardi, C. D'Ambrosio, et al. "Three New Organic Scintillators with Large Stokes Shifts." Applied Spectroscopy 51, no. 8 (1997): 1193–99. http://dx.doi.org/10.1366/0003702971941737.

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Three new organic scintillators (PMP-410, PMP470, and PMP480) were synthesized on the basis of 1-phenyl-3-mesityl-2-pyrazoline (PMP). Their synthesis and their polymerization in polystyrene are described. We measured their Stokes shifts in polystyrene (∼1.3 eV) between their absorption maxima (PMP-410: 287 nm; PMP-470: 315 nm; PMP-480: 314 nm) and their emission maxima (PMP-410: 408 nm; PMP-470: 480 nm; PMP-480: 479 nm). Absorption and emission maxima, Stokes shifts, and light yields of all eight pyrazoline scintillators so far synthesized are listed and are compared with results for 3-hydroxy

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14

Galezowski, Wlodzimierz, Kenneth T. Leffek, and Przemyslaw Pruszynski. "Tetramethylguanidino-substituted pyrylium and thiopyrylium salts." Canadian Journal of Chemistry 70, no. 9 (1992): 2390–93. http://dx.doi.org/10.1139/v92-302.

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Four new tetramethylguanidino-substituted pyrylium and thiopyrylium salt dyes have been prepared and their absorption maxima in the visible region measured. The positions of the absorption maxima are similar to those observed for thiopyrylium salt dyes used in photoconductive film compositions. The λmax values for the new dyes, when compared to those of other pyrylium and thiopyrylium dyes in the literature, yield a σp value of −0.86 ± 0.04 and a σ+ value of −1.8 ± 0.1 for the tetramethylguanidino group, in good agreement with previous determinations.

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15

Navozenko, Oleksandr, Valeriy Yashchuk, Oleksiy Kachkovsky, et al. "Aggregate Formation of Boron-Containing Molecules in Thermal Vacuum Deposited Films." Materials 14, no. 19 (2021): 5615. http://dx.doi.org/10.3390/ma14195615.

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The spectral properties of new boron-containing dyes were studied. One-component (pure dyes) and composite “Alq3+dye” thin films were fabricated using the thermal vacuum deposition method. The positions of the transmission spectra maxima in a one-component film are different for different film thicknesses. The best correlation of the maxima positions of the dye transmission spectra in solid and liquid solutions was observed for thicknesses of films close to a few (up to 10) monolayers. On the other hand, the absorption spectra maxima positions of one-component dye films (upper 10 nm) and compo

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16

Shkrob, Maria A., Yurii G. Yanushevich, Dmitriy M. Chudakov, et al. "Far-red fluorescent proteins evolved from a blue chromoprotein from Actinia equina." Biochemical Journal 392, no. 3 (2005): 649–54. http://dx.doi.org/10.1042/bj20051314.

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Proteins of the GFP (green fluorescent protein) family demonstrate a great spectral and phylogenetic diversity. However, there is still an intense demand for red-shifted GFP-like proteins in both basic and applied science. To obtain GFP-like chromoproteins with red-shifted absorption, we performed a broad search in blue-coloured Anthozoa species. We revealed specimens of Actinia equina (beadlet anemone) exhibiting a bright blue circle band at the edge of the basal disc. A novel blue chromoprotein, aeCP597, with an absorption maximum at 597 nm determining the coloration of the anemone basal dis

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17

Tsujimoto, Keijiro, Shinya Yamamoto, and Hideki Fujiwara. "Synthesis and Physical Properties of Tetrathiafulvalene-8-Quinolinato Zinc(II) and Nickel(II) Complexes." Inorganics 9, no. 2 (2021): 11. http://dx.doi.org/10.3390/inorganics9020011.

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To develop donor–acceptor–donor (D–A–D) type new photo-electric conversion materials, new tetrathiafulvalene (TTF)-Mq2-TTF complexes 1 and 2 were synthesized, where two bis(n-hexylthio)tetrathiafulvalene moieties were attached to the Mq2 part (1: M = Zn, 2: M = Ni, q = 8-quinolinato) through amide bonds. UV-Vis absorption spectra of these complexes showed strong and sharp absorption maxima at 268 nm and small absorption maxima around 410 nm, corresponding to those of Znq2 and Niq2 parts. Furthermore, complexes 1 and 2 exhibited absorption tails up to a much longer wavelength region of ca. 700

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18

Seshamamba, Burla Sunitha Venkata, Peruri Veera Venkata Satyanarayana, and Chandra Bala Sekaran. "Development and Validation of Spectrophotometric Methods for the Quantification of Solifenacin Succinate: Application to Tablet Dosage Forms." International Letters of Chemistry, Physics and Astronomy 15 (September 2013): 167–82. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.15.167.

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Four sensitive, precise and accurate spectrophotometric methods for the estimation of solifenacin succinate (SFS) have been developed. Method A describes the interaction of SFS with potassium permanganate in alkaline medium to give green colored manganate ion with absorption maxima at 610 nm. Methods B and C are based on the formation of ternary complexes of SFS with, copper (II)/eosin (method B) and ammonium molybdate/ammonium thiocyanate (method C), respectively which are extracted into chloroform and have absorption maxima at 545 nm (method B) and 465 nm (method C). Method D was based on th

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19

Seshamamba, Burla Sunitha Venkata, Peruri Veera Venkata Satyanarayana, and Chandra Bala Sekaran. "Development and Validation of Spectrophotometric Methods for the Quantification of Solifenacin Succinate: Application to Tablet Dosage Forms." International Letters of Chemistry, Physics and Astronomy 15 (June 29, 2013): 167–82. http://dx.doi.org/10.56431/p-0t227j.

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Four sensitive, precise and accurate spectrophotometric methods for the estimation of solifenacin succinate (SFS) have been developed. Method A describes the interaction of SFS with potassium permanganate in alkaline medium to give green colored manganate ion with absorption maxima at 610 nm. Methods B and C are based on the formation of ternary complexes of SFS with, copper (II)/eosin (method B) and ammonium molybdate/ammonium thiocyanate (method C), respectively which are extracted into chloroform and have absorption maxima at 545 nm (method B) and 465 nm (method C). Method D was based on th

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20

Ikramov, R. G., M. A. Nuriddinova, and R. M. Jalalov. "Density of Defect States and Spectra of Defect Absorption in a-Si:H." Ukrainian Journal of Physics 64, no. 4 (2019): 315. http://dx.doi.org/10.15407/ujpe64.4.315.

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Spectral characteristics of the coefficient of defect absorption in amorphous hydrogenated silicon have been studied. The characteristics are determined, by analyzing the electron transitions occurring with the participation of the energy states of dangling bonds. It is shown that the principal role in the formation of the defect absorption coefficient value is played by the electron transitions between defect and non-localized states. It is also shown that the spectral characteristics are mainly determined by the distribution function of the electron density of states in the valence or conduc

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21

Xu, Jie, Lei Wang, Li Liu, Zikui Bai, and Luoxin Wang. "QSPR Study of the Absorption Maxima of Azobenzene Dyes." Bulletin of the Korean Chemical Society 32, no. 11 (2011): 3865–72. http://dx.doi.org/10.5012/bkcs.2011.32.11.3865.

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22

Matsuura, Azuma, Tomohiko Hayashi, Hiroyuki Sato, Atsuya Takahashi, and Minoru Sakurai. "Theoretical study on the absorption maxima of real GFPs." Chemical Physics Letters 484, no. 4-6 (2010): 324–29. http://dx.doi.org/10.1016/j.cplett.2009.11.074.

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23

Althagafi, Talal M., Mudassir Hussain Tahir, Sumaira Naeem, Fatimah Mohammed A. Alzahrani, and M. S. Al-Buriahi. "Prediction of UV/visible absorption maxima of organic compounds in dichloromethane and database generation of organic compounds with red-shifted absorption maxima." Organic Electronics 145 (October 2025): 107304. https://doi.org/10.1016/j.orgel.2025.107304.

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24

Lungu, Ion, Tamara Potlog, Anton Airinei, Radu Tigoianu, and Carmen Gherasim. "Exploring the Photophysical Properties of Some Dextran-Iron Oxide Nanoparticle Composites." Molecules 30, no. 11 (2025): 2290. https://doi.org/10.3390/molecules30112290.

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In this study, we report the synthesis and characterization of Fe3O4 nanoparticles coated with dextran. The structural and optical properties of the Dx:Fe3O4 synthesized composites were investigated by Fourier Transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and UV–Vis absorption spectroscopy. For the first time in this paper, the photophysics of Dx:Fe3O4 composites in water is studied using fluorescence and phosphorescence molecular spectrometry. An analysis of the absorption spectra of the Dx:Fe3O4 composite reveals the broad absorption bands with maxima at wavelengths of 227

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25

Zhurin, Timofey, Elena Sim, and Stanislav Shandarov. "ANALYSIS OF THE SPECTRAL DEPENDENCES THE TRANSMISSION COEFFICIENT IN A BISMUTH SILICATE CRYSTAL AT HARMONIC MODULATION OF EXCESS RADIATION UNDER WAVE LENGTH." Interexpo GEO-Siberia 6, no. 1 (2019): 3–8. http://dx.doi.org/10.33764/2618-981x-2019-6-1-3-8.

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It was found that the analysis of harmonic components determining the time dependence the transmission coefficient of a bismuth silicate crystal during sinusoidal modulation of the probe radiation over the wavelength makes it possible to determine the spectral position of the maxima for intracenter transitions in defective centers contributing to impurity optical absorption. It was found that the analysis of harmonic components, which determine the time dependence transmission coefficientof an aluminum-doped bismuth titanate crystal with sinusoidal modulation of probe radiation over a waveleng

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26

Molnar, Eva, Emese Gál, Luiza Găină, Castelia Cristea, and Luminița Silaghi-Dumitrescu. "Ethyne Functionalized Meso-Phenothiazinyl-Phenyl-Porphyrins: Synthesis and Optical Properties of Free Base Versus Protonated Species." Molecules 25, no. 19 (2020): 4546. http://dx.doi.org/10.3390/molecules25194546.

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Synthesis, structural characterization and photophysical properties for a series of new trans-A2B2- and A3B-type ethynyl functionalized meso-phenothiazinyl-phenyl porphyrin derivatives are described. The new compounds displayed the characteristic porphyrin absorption spectra slightly modified by weak auxochromic effects of the substituents and fluorescence emission in the range of 651–659 nm with 11–25% quantum yields. The changes recorded in the UV-vis absorption spectra in the presence of trifluoroacetic acid (TFA) are consistent with the protonation of the two internal nitrogen atoms of the

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27

DOINA, BEJAN. "Influence of pressure and temperature on the magneto-optical properties and Aharonov-Bohm oscillations of a quantum ring." Romanian Reports in Physics 76, no. 1 (2024): 503. http://dx.doi.org/10.59277/romrepphys.2024.76.503.

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We theoretically investigated the influence of pressure and temperature on the electronic and optical properties of a GaAs /Al0.3Ga0.7As quantum ring, described by a combination of a parabolic potential and an inverse square one, in the presence of the magnetic field. The results reveal a variation with pressure and temperature of the period of Aharonov-Bohm oscillations appearing in the electronic spectra in magnetic field. This period varies nonlinearly with pressure and temperature. In the absorption spectra and refractive index variation at 4 K, we found that with the increment of the magn

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28

Lasorne, Benjamin, Joaquim Jornet-Somoza, Hans-Dieter Meyer, David Lauvergnat, Michael A. Robb, and Fabien Gatti. "Vertical transition energies vs. absorption maxima: Illustration with the UV absorption spectrum of ethylene." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 119 (February 2014): 52–58. http://dx.doi.org/10.1016/j.saa.2013.04.078.

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29

Shen, Chia-An, and Frank Würthner. "NIR-emitting squaraine J-aggregate nanosheets." Chemical Communications 56, no. 68 (2020): 9878–81. http://dx.doi.org/10.1039/d0cc03686b.

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30

Dr., A. Madhukar *. Gariganti Swathi 1. Tanveer Fatima 2. Amina Fatima 2. Madhia Nikhat 2. Mohd Akram Mohsin 2. "A Simple Method Development and Validation for the Determination of Tolbutamide in Bulk and Marketed Dosage Form by UV - Spectrophotometric Technique." Journal of Pharma Research 9, no. 7 (2020): 6. https://doi.org/10.5281/zenodo.3931525.

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ABSTRACT The present work was to develop simple UV spectrophotometric methods for estimation of Tolbutamide (TOL) in bulk and tablet dosage form and validate as per ICH guidelines. In this method the absorption maxima was scanned from 200 – 400 nm and the λmax was found to be 248 nm was selected for analysis of Tolbutamide. Linearity was observed in the concentration range 1-12μg/ml (r2 =0.9992) for the method. The % assay for the marketed formulation for absorption maxima and area under the curve method was found to be 100.49% and 100.78% respectively. The methods were validat

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Dr., A. Madhukar *. Juveriya Asrar Mariyam Adiba Sultana Shehnaz Begum. "A SIMPLE UV-SPECTROPHOTOMETRIC METHOD DEVELOPMENT AND VALIDATION FOR THE DETERMINATION OF CARVEDILOL IN BOTH BULK AND MARKETED DOSAGE FORM." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES o6, no. 03 (2019): 6920–25. https://doi.org/10.5281/zenodo.2616682.

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<em>The present work was to develop two simple UV spectrophotometric methods for simultaneous estimation of Carvedilol (CAR) in bulk and tablet dosage form and validate as per ICH guidelines. In this method the absorption maxima was scanned from 200 – 400 nm and the λmax was found to be 248 nm was selected for analysis of Carvedilol. Linearity was observed in the concentration range 1-12μg/ml (r2 =0.9992) for the method. The % assay for the marketed formulation for absorption maxima and area under the curve method was found to be 100.69% and 100.82% respectively. The methods we

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32

Locharoenrat, Kitsakorn. "Copper Nanowires on NaCl (110) Template." Applied Mechanics and Materials 313-314 (March 2013): 198–201. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.198.

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We studied optical properties of copper nanowires fabricated by a shadow deposition method. We found that the optical absorption spectra of thinner nanowires exhibited stronger anisotropic absorption than thickner nanowires. Absorption maxima are located at lower photon energy when incident field is parallel to the wire axes than they are perpendicular to each other. They also shift to lower energy when the widths of nanowires are increased.

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Usha Rani, N., R. Sreenivasa Rao, and K. Saraswathi. "NEW SPECTROPHOTOMETRIC METHODS FOR THE QUANTITATIVE ESTIMATION OF ELETRIPTAN IN DRUG FORMULATION." INDIAN DRUGS 51, no. 01 (2014): 18–26. http://dx.doi.org/10.53879/id.51.01.p0018.

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Five simple, accurate, sensitive and economical UV spectrophotometric methods has been developed and subsequently validated for the determination of eletriptan in bulk and pharmaceutical formulations. The methods were based on the formulation of colored complex of eletriptan with different reagents. Absorbance of the formed color complex is measured against the reagent blank at the wavelength of maximum absorbance. In this paper, five spectrophotometric methods were proposed. Method A is based on the formation of oxidative coupling reaction involving the use of iron (III) – MBTH (3-methyl-2-be

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34

Koval, A. O. "Frequency shifts of surface plasmon resonances in calculating the absorption coefficient of a composite based on bimetallic 1D-systems." Physics and Chemistry of Solid State 24, no. 2 (2023): 290–97. http://dx.doi.org/10.15330/pcss.24.2.290-297.

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In this paper analyzes the electromagnetic radiation absorption by a composite based on bimetallic nanowires. Using the Drude-Lorentz theory it was obtained the relationship for the polarizability frequency dependences, as well as real and imaginary parts of the dielectric function of layered 1D-systems was obtained. It is shown that the structure in the form of a metal core covered with a layer of another metal leads to splitting and the appearance of two maxima in the frequency dependence of the absorption coefficient. The magnitude and position of the maxima are determined by the compositio

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35

Wahbi, Abdel-Aziz M., Mohammad A. Abounassif, and Hussein M. G. Al-Kahtani. "Ratios of first-derivative maxima and compensated derivative absorption curves." Analyst 111, no. 7 (1986): 777. http://dx.doi.org/10.1039/an9861100777.

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36

Hiruta, Kimihiro, Sumio Tokita, and Kichisuke Nishimoto. "Practical PPP molecular orbital calculations of absorption maxima of quinones." Dyes and Pigments 38, no. 1-3 (1998): 165–72. http://dx.doi.org/10.1016/s0143-7208(97)00078-8.

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37

Milder, Steven J. "Correlation between absorption maxima and thermal isomerization rates in bacteriorhodopsin." Biophysical Journal 60, no. 2 (1991): 440–46. http://dx.doi.org/10.1016/s0006-3495(91)82070-7.

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38

Renge, I. "Solvent dependence of the visible absorption maxima of meso-tetraphenylporphine." Chemical Physics Letters 185, no. 3-4 (1991): 231–36. http://dx.doi.org/10.1016/s0009-2614(91)85053-y.

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39

Kawaguchi, Kazutomo, and Takahisa Yamato. "Theoretical prediction of optical absorption maxima for photosensory receptor mutants." Chemical Physics Letters 430, no. 4-6 (2006): 386–90. http://dx.doi.org/10.1016/j.cplett.2006.08.141.

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40

Renge, Indrek. "Solvent effects on the visible absorption maxima of tetrapyrrolic pigments." Journal of Physical Chemistry 97, no. 25 (1993): 6582–89. http://dx.doi.org/10.1021/j100127a004.

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Fowler, R. H., and E. A. Milne. "The maxima of absorption lines in stellar spectra (second paper)." Journal of Astrophysics and Astronomy 15, no. 3 (1994): 241–57. http://dx.doi.org/10.1007/bf02709305.

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Tian, Minquan, Satoshi Tatsuura, Makoto Furuki, Yasuhiro Sato, Izumi Iwasa та Lyong Sun Pu. "Discovery of Novel Dyes with Absorption Maxima at 1.1 μm". Journal of the American Chemical Society 125, № 2 (2003): 348–49. http://dx.doi.org/10.1021/ja0209666.

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Wang, Hao, Theo E. Kaiser, Shinobu Uemura, and Frank Würthner. "Perylene bisimide J-aggregates with absorption maxima in the NIR." Chemical Communications, no. 10 (2008): 1181. http://dx.doi.org/10.1039/b717407a.

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Zevenboom, Wanda. "Tracing red-pigmented marine cyanobacteria using in vivo absorption maxima." FEMS Microbiology Letters 38, no. 5 (1986): 267–75. http://dx.doi.org/10.1111/j.1574-6968.1986.tb01737.x.

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Thivierge, Cliferson, Aurore Loudet, and Kevin Burgess. "Brilliant BODIPY−Fluorene Copolymers with Dispersed Absorption and Emission Maxima." Macromolecules 44, no. 10 (2011): 4012–15. http://dx.doi.org/10.1021/ma200174w.

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Kósa, Csaba, Jaroslav Mosnáček, Adela Bílešová, et al. "Synthesis, Oxidation and Photophysical Properties of Novel Derivatives of Acyclic Aromatic Amines." Collection of Czechoslovak Chemical Communications 72, no. 9 (2007): 1255–68. http://dx.doi.org/10.1135/cccc20071255.

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Abstract:

Conjugated acyclic arylamine derivatives, N-(4-methylphenyl)-N-(2-methyl-1-phenylpropyl)amine and N-(4-methoxyphenyl)-N-(2-methyl-1-phenylpropyl)amine, have been synthesized and characterized. Their photophysical properties have been investigated in polar methanol and non-polar cyclohexane solutions, and in PS and PMMA polymer matrices. The influence of the environment polarity as well as of the substituent in para-position of the aryl on the absorption, emission spectra and the fluorescence quantum yield has been studied. In the absorption and emission spectra, the observed absorption and emi

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Sapkota, Manish, Gourab Karmakar, Prasant Nahak, et al. "Effect of polymer charge on the formation and stability of anti-inflammatory drug loaded nanostructured lipid carriers: physicochemical approach." RSC Advances 5, no. 81 (2015): 65697–709. http://dx.doi.org/10.1039/c5ra11066a.

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Tang, Ze Biao, Xiao Xia Sun, He Wei Yan, and Le Ping Miao. "Synthesis of a Novel D-A Type Molecule Based on Carbazole Unit for Organic Light-Emitting Material Applications." Advanced Materials Research 989-994 (July 2014): 292–96. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.292.

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Abstract:

A novel D-A type molecule based on carbazole central core and aldehyde terminal groups has been designed and synthesized. Optical properties of the resulting compounds were examined by means of UV-vis and fluorescence spectroscopies. It shows that, the absorption and fluorescence spectra of M2 are large red-shifted relative to M1 in both states, whereas the absorption maximum and emission maxima of M1 and M2 are small blue-shifted, from solution to the solid state. The fluorescence spectra exhibit that the emission maxima of the compounds which range from 419 nm to 472 nm belong to blue light

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Mudliar, Niyati H., and Prabhat K. Singh. "A molecular rotor-based turn-on sensor probe for amyloid fibrils in the extreme near-infrared region." Chemical Communications 55, no. 27 (2019): 3907–10. http://dx.doi.org/10.1039/c9cc01262a.

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Bhusari, Sachin, Bharti Gotmare, and Pravin Wakte. "SIMULTANEOUS ESTIMATION OF DOXORUBICIN AND HYDROXYCHAVICOL IN BULK AND PHARMACEUTICAL FORMULATION BY Q-ABSORPTION RATIO METHOD." INDIAN DRUGS 57, no. 02 (2020): 51–58. http://dx.doi.org/10.53879/id.57.02.11873.

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A simple, rapid, accurate, precise and economical UV-spectrophotometric method has been developed and validated for simultaneous estimation of doxorubicin hydroxychavicol (DOXO) and OH-CHV in a pharmaceutical formulation. It is based on the Q-analysis UV Spectrophotometric method. The absorption spectra of DOXO and OH-CHV were obtained over the range of 200-800 nm, and the absorption maxima were determined. Multiple calibration standards were prepared for both the drugs separately and absorbances were recorded at respective absorption maxima. Calibration curves were plotted and the linear resp

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