01590nas a2200181   4500008004100000022001400041245007400055210006900129260000900198300001400207490000700221520098100228100001801209700002601227700002201253700003001275856010301305       2021                        eng d  a1477-052000aAggregation-induced phosphorescence of an anthraquinone based emitter0 aAggregationinduced phosphorescence of an anthraquinone based emi  cFEB   a1004-10080 v193 a<p>Room temperature phosphorescence (RTP) of metal-free organic molecules is a hot topic of current research interest. RTP can be enhanced through aggregation, crystallization, and the support of polymers and host-guest assemblies. The characteristics of highly phosphorescent aggregates formed from conventional chromophores make them ideal candidates for many potential applications. In this direction, we focused on the aggregation-induced phosphorescence of an anthraquinone derivative AqC6 in solution and in crystal state. The weakly emissive dilute solution exhibits a tunable emission with enhanced intensity and room temperature phosphorescence by increasing the concentration and solvent-antisolvent combination. The enhanced phosphorescence of crystals has been recreated in the solution by making use of aggregation. Interestingly, the support of PMMA enabled AqC6 to achieve enhanced processability, phosphorescence lifetime (174 ms) and quantum yield (5%).</p>
1 aGoudappagouda1 aNidhankar, Aakash, D.1 aNayak, Rashmi, A.1 aBabu, Sukumaran, Santhosh  uhttps://library.ncl.res.in/content/aggregation-induced-phosphorescence-anthraquinone-based-emitter01333nas a2200181   4500008004100000022001400041245007700055210007000132260000900202300001600211490000700227520071700234100002400951700001800975700001600993700003001009856011201039       2025                        eng d  a1523-706000aAccessing electron-deficient π-extended pyrenes via non-K-region fusion0 aAccessing electrondeficient πextended pyrenes via nonKregion fus  cNOV   a12270-122750 v273 a<p>
	This study presents a new class of pyrene derivatives featuring non-K-region fusion and electron-deficient pi-extension. By strategically introducing electron-withdrawing groups at the non-K positions, the optical and redox properties of these compounds were significantly altered. For the first time, we report a non-K-region fused acceptor pyrene with an extended pi-skeleton. The detailed characterizations revealed pronounced shifts in both absorption and emission spectra, accompanied by a significant lowering of the LUMO energy levels. Our results highlight non-K region-fused pyrenes as a promising building block for next-generation organic semiconductors with tunable electronic properties.</p>
1 aDongre, Sangram, D.1 aKumar, Viksit1 aKumar, Ravi1 aBabu, Sukumaran, Santhosh  uhttps://library.ncl.res.in/content/accessing-electron-deficient-%CF%80-extended-pyrenes-non-k-region-fusion