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The influence of molecular flexibility on the mesogenic behavior of a new homologous series based on azo-azomethine: Synthesis, characterization, photoisomerization and DFT study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Al-Barody SM. Characterization and Thermal Study of Schiff-Base Monomers and Its Transition Metal Polychelates and Their Photovoltaic Performance on Dye Sensitized Solar Cells. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618010092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Georgiev A, Kostadinov A, Ivanov D, Dimov D, Stoyanov S, Nedelchev L, Nazarova D, Yancheva D. Synthesis, spectroscopic and TD-DFT quantum mechanical study of azo-azomethine dyes. A laser induced trans-cis-trans photoisomerization cycle. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 192:263-274. [PMID: 29156313 DOI: 10.1016/j.saa.2017.11.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 10/21/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
This paper describes the synthesis, spectroscopic characterization and quantum mechanical calculations of three azo-azomethine dyes. The dyes were synthesized via condensation reaction between 4-(dimethylamino)benzaldehyde and three different 4-aminobenzene azo dyes. Quantum chemical calculations on the optimized molecular geometry and electron densities of the trans (E) and cis (Z) isomers and their vibrational frequencies have been computed by using DFT/B3LYP density-functional theory with 6-311++G(d,p) basis set in vacuo. The thermodynamic parameters such as total electronic energy E (RB3LYP), enthalpy H298 (sum of electronic and thermal enthalpies), free Gibbs energy G298 (sum of electronic and thermal free Gibbs energies) and dipole moment μ were computed for trans (E) and cis (Z) isomers in order to estimate the ΔEtrans→cis, Δμtrans→cis,ΔHtrans→cis, ΔGtrans→cis and ΔStrans→cis values. After molecular geometry optimization the electronic spectra have been obtained by TD-DFT calculations at same basis set and correlated with the spectra of vapour deposited nanosized films of the dyes. The NBO analysis was performed in order to understand the intramolecular charge transfer and energy of resonance stabilization. Solvatochromism was investigated by UV-VIS spectroscopy in five different organic solvents with increasing polarity. The dynamic photoisomerization experiments have been performed in DMF by pump lasers λ=355nm (mostly E→Z) and λ=491nm (mostly Z→E) in spectral region 300nm - 800nm at equal concentrations and times of illumination in order to investigate the photodynamical trans-cis-trans properties of the CHN and NN chromophore groups of the dyes.
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Affiliation(s)
- Anton Georgiev
- Department of Organic Chemistry, 1756 Sofia, 8 St. Kliment Ohridski Blvd, University of Chemical Technology and Metallurgy, Bulgaria.
| | - Anton Kostadinov
- Department of Organic Chemistry, 1756 Sofia, 8 St. Kliment Ohridski Blvd, University of Chemical Technology and Metallurgy, Bulgaria
| | - Deyan Ivanov
- Department of Optical Metrology and Holography, Department of Optical Materials, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Institute of Optical Materials and Technologies, Bulgarian Academy of Science, Bulgaria
| | - Deyan Dimov
- Department of Optical Metrology and Holography, Department of Optical Materials, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Institute of Optical Materials and Technologies, Bulgarian Academy of Science, Bulgaria
| | - Simeon Stoyanov
- Laboratory of Structural Organic Analysis, Sofia 1113, 9 Acad. G. Bonchev Blvd., Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Science, Bulgaria
| | - Lian Nedelchev
- Department of Optical Metrology and Holography, Department of Optical Materials, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Institute of Optical Materials and Technologies, Bulgarian Academy of Science, Bulgaria
| | - Dimana Nazarova
- Department of Optical Metrology and Holography, Department of Optical Materials, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Institute of Optical Materials and Technologies, Bulgarian Academy of Science, Bulgaria
| | - Denitsa Yancheva
- Laboratory of Structural Organic Analysis, Sofia 1113, 9 Acad. G. Bonchev Blvd., Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Science, Bulgaria
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Mesogenic properties and studies of the photoisomerization process in solutions of branched azobenzene derivatives with ester group. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Afzal SM, Razvi MAN, Khan SA, Osman OI, Bakry AH, Asiri AM. Physicochemical and Nonlinear Optical Properties of Novel Environmentally Benign Heterocyclic Azomethine Dyes: Experimental and Theoretical Studies. PLoS One 2016; 11:e0161613. [PMID: 27631371 PMCID: PMC5025016 DOI: 10.1371/journal.pone.0161613] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 08/09/2016] [Indexed: 11/19/2022] Open
Abstract
Novel heterocyclic azomethine dyes were prepared by the reaction of anthracene-9-carbaldehyde with different heterocyclic amines under microwave irradiation. Structures of the azomethine dyes were confirmed by the elemental analysis, mass spectrometry and several spectroscopic techniques. We studied absorbance and fluorescence spectra of the azomethine dyes in various solvents. They are found to be good absorbers and emitters. We also report photophysical properties like, extinction coefficient, oscillator strength, stokes shift and transition dipole moment. This reflects physicochemical behaviors of synthesized dyes. In addition, their intramolecular charge transfer and nonlinear optical properties, supported by natural bond orbital technique, were also studied computationally by density functional theory. The negative nonlinear refractive index and nonlinear absorption coefficient were measured for these dyes using the closed and open aperture Z-scan technique with a continuous wave helium-neon laser. These are found to vary linearly with solution concentration.
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Affiliation(s)
- S. M. Afzal
- Physics Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
- Physics Department, Aligarh Muslim University, Aligarh, 202002, India
- * E-mail:
| | - M. A. N. Razvi
- Physics Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Salman A. Khan
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Osman I. Osman
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
- Chemistry Department, Faculty of Science, University of Khartoum, P.O. Box 321, Khartoum, 11111, Sudan
| | - Ahmed H. Bakry
- Physics Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Abdullah M. Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
- The Center of Excellence for Advanced Materials, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
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Zhang Y, Hu PC, Cai P, Yang F, Cheng GZ. Synthesis, characterization, crystal structure, cytotoxicity, apoptosis and cell cycle arrest of ruthenium(ii) complex [Ru(bpy)2(adpa)](PF6)2 (bpy = 2,2′-bipyridine, adpa = 4-(4-aminophenyl)diazenyl-N-(pyridin-2-ylmethylene)aniline). RSC Adv 2015. [DOI: 10.1039/c4ra12715c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new ruthenium complex (Ru-adpa) characterized by single X-ray diffraction exhibits excellent cytotoxicity against AGS cells.
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Affiliation(s)
- Yan Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Peng-Chao Hu
- School of Basic Medicine
- Wuhan University
- Wuhan
- China
| | - Ping Cai
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Fang Yang
- School of Basic Medicine
- Wuhan University
- Wuhan
- China
| | - Gong-Zhen Cheng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
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Synthesis and Characterization of Nonsymmetric Liquid Crystal Dimer Containing Biphenyl and Azobenzene Moiety. J CHEM-NY 2013. [DOI: 10.1155/2013/939406] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Calamitic liquid crystalline dimer containing azobenzene moiety and a decyloxy biphenyl linked by flexible spacers {4-[7-(4′-decyloxy-biphenyl-4-yloxy)-alkyloxy]-phenyl}-(4-decyl-phenyl)-diazene has been synthesized and characterized by spectroscopic methods. The transition temperatures and phase behaviours were studied by Differential Scanning Calorimeter (DSC) and Polarizing Optical Microscope (POM). The synthesized compounds exhibited enantiotropic liquid crystal phase with higher spacer display nematic and smectic C phases while lower spacer shows nematic and smectic A phases.
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