Optical, electrochemical and current-voltage characteristics of novel coumarin based 2,4-dinitrophenylhydrazone derivatives

被引：13
作者：
Basavarajappa, K., V [1 ,2 ]
Nayaka, Y. Arthoba [1 ]
Purushothama, H. T. [1 ]
Yathisha, R. O. [1 ]
Vinay, M. M. [1 ]
Rudresha, B. J. [3 ]
Manjunatha, K. B. [4 ]
机构：
[1] Kuvempu Univ, Dept PG Studies & Res Chem, Shankaraghatta 577451, Karnataka, India
[2] Govt First Grade Coll, Dept Chem, Davangere 577004, Karnataka, India
[3] Sri Dharmasthala Manjunatheshwara Coll Autonomous, Dept Chem, Ujire, Karnataka, India
[4] NMAM Inst Technol, Dept Phys, Nitte 574110, India
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2020年 / 1199卷
关键词：
Coumarins; Nanocones; FMO; Optical limiting; I-V characteristics; SOLAR-CELLS; Z-SCAN; ABSORPTION; THIOPHENE; POLYMER;
D O I：
10.1016/j.molstruc.2019.126946
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：
A series of novel 2,4-dinitrophenylhydrazone derivatives of coumarins (DNP1-DNP3) have been synthesized by novel method and characterized by spectroscopic techniques and were used as photosensitizers on zinc nanocones, which were prepared by microwave combustion method. Optical (linear and nonlinear), electrochemical and current-voltage (I-V) characteristics of dyes and dyes sensitized zinc nanocones were evaluated. In addition, the global chemical parameters were calculated. The results revealed that, synthesized dyes possess good light absorbing capability and well matched frontier molecular orbital (FMO) energy levels with conduction band (CB) of zinc nanocones. Among the synthesized coumarin derivatives, DNP3 has smallest band gap of 2.24 eV, highest 3 value of 1, 00,000 M(-1)cm(-1), larger NLA coefficient of 0.055 (cmW(-1)), least hardness value of 0.78 eV and highest V-oc value of 0.98 V. Moreover, it exhibits better optical power limiting behavior. The enhanced I-V response of the sensitized nanocones in presence of light implies that the synthesized dyes are good photosensitizers. (C) 2019 Elsevier B.V. All rights reserved.
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页数：12
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