Please use this identifier to cite or link to this item:
Title: Synthesis and comparative solvatochromic studies of simple and donor acceptor benzimidazole incorporated naphthyridine systems
Authors: Mashraqui, Sabir H
Britto, Smita
Mestri, Rupesh
Chilekar, Aniket
Upadhyay, Jyoti
Keywords: Benzimidazole fused naphthyridines;Synthesis;Solvatochromic studies;Dipole moments;Intramolecular charge transfer
Issue Date: Oct-2017
Publisher: NISCAIR-CSIR, India
Abstract: Benzimidazo[1,2-a]benzo[g]-1,8-naphthyridine (NB-1) and its donor-acceptor analog, 11-morpholino-benzimidazo[1,2-a]benzo(g)-1,8-naphthyridine-6-carbonitrile, (NB-2) have been synthesized and investigated for their optical and solvatochromic properties. Absorption and emission maxima of the push-pull chromophore, NB-2 were red shifted in comparison to NB-1 lacking in donor-acceptor motif. Both systems are highly fluorescent (φ = 0.74-0.84) and exhibit positive solvatochromism. Using solvatochromic shift method, we estimated 2 fold higher dipole moment in the excited state for NB-2 over NB-1. High degree of electronic charge redistribution in NB-2 seems to be responsible for its optical spectral red shifts and higher dipole moments compared to NB-1.
Page(s): 1075-1081
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.56B(10) [October 2017]

Files in This Item:
File Description SizeFormat 
IJCB 56B(10) 1075-1081.pdf253.17 kBAdobe PDFView/Open

Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.