title: Synthesis and photophysics of selective functionalized π-conjugated, blue light emitting, highly fluorescent C7-imidazo indolizine derivatives.
abstract: A new family of novel highly fluorescent π-conjugated, C7-imidazole based indolizine derivatives has been prepared in good to excellent yields, catalysed by l-proline in acetonitrile. These are π-conjugated, C7-imidazole based indolizine derivatives covering the emission wavelength range 423-449 nm in acetonitrile with high quantum yields at 25 °C. A thorough photophysical study of all the compounds has been carried out to understand the π-conjugated electronic effect of the imidazole moiety fused at the C7 position on the indolizine motif. In addition, a comparative photophysical study of three selective fluorophores was also carried out in a wide variety of solvents at 25 °C. Finally, the molecular orbitals of the two representative compounds were investigated through DFT calculations to illustrate the pi-conjugate effect.
authors.affiliation: Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata-700009, India. cmukhop@yahoo.co.in.
authors.forename: Rajib
authors.initials: R
authors.lastname: Sarkar
authors.forename: Tandrima
authors.initials: T
authors.lastname: Chaudhuri
authors.forename: Animesh
authors.initials: A
authors.lastname: Karmakar
authors.forename: Chhanda
authors.initials: C
authors.lastname: Mukhopadhyay
mesh_terms: D002384:Catalysis; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry*; D007212:Indolizines / Q000737:chemistry*; D008027:Light; D015394:Molecular Structure; D011392:Proline / Q000737:chemistry; D012997:Solvents / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D007093:Imidazoles; D007212:Indolizines; D012997:Solvents; C035094:indolizine; C029899:imidazole; D011392:Proline