الفهرس 
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Abstract
We have synthesized different triphenylamine based heterocyclic compound AR1-14 for DSSCs application. Their chemical structures of were confirmed by the different elemental and spectral analysis. Moreover, from their UV spectra, all dyes showed high molar extinction co-efficient which attributed to the incorporation of cyanoacetanilide moiety and thiazolidine-5-one as strong acceptor moiety besides the superior donating power of the triphenylamine. Further, DFT / TD-DFT studies was performed using Gaussian 09 to gain inside the molecular structure of the new dyes besides measuring HOMO / LUMO energy levels. Scheme 1 showed the synthetic pathway of three novel D-π-A configured metal free dyes AR1-3 possessing triphenylamine moiety as a strong donating moiety. The target dyes AR1-3 were obtained in good yield.Further as shown in Scheme 2, we synthesized a different class of chromophores AR4-6 containing di-anchoring moieties by condensation of bis(2-cyanoacetamide) derivative (3) with three types of aromatic aldehydes (namely, 4-methoxybenzaldehyde, 2,4,6-trimethoxybenzaldehyde and 4-(diphenylamino)-benzaldehyde) in 1:2 molar ratios in DMF and piperidine under reflux conditions.