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Frontispiece: A Nonarchetypal 5,6‐Dihydro‐2 H ‐pyrano[3,2‐ g ]indolizine‐Based Solution‐Solid Dual Emissive AIEgen with Multicolor Tunability
Author(s) -
Raghuvanshi Ashutosh,
Jha Ajay Kumar,
Sharma Ashutosh,
Umar Shahida,
Mishra Shachi,
Kant Ruchir,
Goel Atul
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201781962
Subject(s) - indolizine , intramolecular force , solid state , dual (grammatical number) , materials science , chemistry , physics , stereochemistry , nanotechnology , art , literature
Through screening of a synthetic library a novel class of dihydropyrano[3,2‐ g ]indolizine (DPI)‐based solution–solid dual compounds with aggregation‐induced emission characteristics (AIEgens) was discovered by A. Goel et al. and is reported in their Communication on page 4527 ff. The AIEgens operate by a restriction of intramolecular vibration (RIV) mechanism. A range of multicolor (red, yellow, green, and blue) solid‐state luminogens was synthesized. Detailed analysis of the crystal structure of the DPIs revealed a well‐defined set of noncovalent interactions (CH⋅⋅⋅O and/or CH⋅⋅⋅N), which blocked the motion of C 2 ‐flexure leading to RIV, thus promoting highly emissive behavior in the solid state.