Synthesis, characterization and DFT study of methoxybenzylidene containing chromophores for DSSC materials

Abdullah G. Al-Sehemi, Ahmad Irfan, Abdullah M. Asiri, Yousry Ahmed Ammar

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Novel tricyanovinyl derived from hydrazones have been prepared by the reaction of tetracyanoethylene and phenylethylidene hydrazone, and these dyes showed absorption in the region of 539-650 nm. The dyes showed pronounced solvatochromic effects as the polarity of the solvents changed. The torsion in E isomer is smaller than Z and azo isomers of MBD1 and MBD2. The HOMOs are delocalized on whole of the molecule while LUMOs are distributed on the tricarbonitrile. The LUMO energies are above the conduction band of TiO 2 and HOMOs of the dyes are below the redox couple of MBD1 and MBD2. The HOMO energies, LUMO energies and HOMO-LUMO energy gap of MBD1 and MBD2 are almost same. The absorption spectra of both the dyes in different solvents are approximately same except in cyclohexane. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)239-243
Number of pages5
JournalSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Volume91
DOIs
StatePublished - Jun 2012
Externally publishedYes

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