Synthesis and optical properties of coumarins and iminocoumarins: Estimation of ground- and excited-state dipole moments from a solvatochromic shift and theoretical methods

被引：30

作者：

Rabahi, Amal ^{[1
,2
]}

Makhloufi-Chebli, Malika ^{[1
,3
]}

Hamdi, Safouane M. ^{[4
]}

Silva, Artur M. S. ^{[5
,6
]}

Kheffache, Djaffar ^{[7
]}

Boutemeur-Kheddis, Baya ^{[1
]}

Hamdi, Maamar ^{[1
]}

机构：

[1] Univ Sci & Technol, Fac Chim, Lab Chim Organ Appl, Grp Heterocycles, Algiers 16111, Algeria

[2] Ctr Rech Sci & Tech Anal Phys Chim CRAPC, Algiers 16004, Algeria

[3] Univ Mouloud Mammeri, Fac Sci, Dept Chim, Tizi Ouzou 15000, Algeria

[4] CHU Toulouse, Inst Federatif Biol, Lab Biochim Purpan, F-31039 Toulouse 9, France

[5] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal

[6] Univ Aveiro, QOPNA, P-3810193 Aveiro, Portugal

[7] Univ Sci & Technol USTHB, Fac Chim, Lab Chim Theor Computat & Photon, Algiers 16111, Algeria

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2014年 / 195卷

关键词：

Iminocoumarin; Coumarin; Microwave; Photophysical properties; PART; 1; FLUORESCENCE; PLANTS; ABSORPTION; MOLECULES; DYES;

D O I：

10.1016/j.molliq.2014.02.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The optical properties of coumarin and iminocoumarin were investigated in different solvents by UV/vis absorption and fluorescence spectroscopy at room temperature (298 K). These compounds were characterized by UV-vis, FT-IR, mass spectroscopy and NMR. A bathochromic shift is observed in absorption and fluorescence spectra of our molecules with increasing solvent polarity. Solvatochromic correlations were used to obtain the ground-state and excited-state dipole moments. The excited-state dipole moments for all the molecules were found to be larger than the corresponding ground-state dipole moments. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：240 / 247

页数：8

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