<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Nidhankar, Aakash D.</style></author><author><style face="normal" font="default" size="100%">Goudappagouda</style></author><author><style face="normal" font="default" size="100%">Kumari, Divya S. Mohana</style></author><author><style face="normal" font="default" size="100%">Chaubey, Shailendra Kumar</style></author><author><style face="normal" font="default" size="100%">Nayak, Rashmi</style></author><author><style face="normal" font="default" size="100%">Gonnade, Rajesh G.</style></author><author><style face="normal" font="default" size="100%">Kumar, G. V. Pavan</style></author><author><style face="normal" font="default" size="100%">Krishnan, Retheesh</style></author><author><style face="normal" font="default" size="100%">Babu, Sukumaran Santhosh</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Self-assembled helical arrays for the stabilization of the triplet state</style></title><secondary-title><style face="normal" font="default" size="100%">Angewandte Chemie-International Edition</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">carbazole</style></keyword><keyword><style  face="normal" font="default" size="100%">helicity</style></keyword><keyword><style  face="normal" font="default" size="100%">phenylmethanone</style></keyword><keyword><style  face="normal" font="default" size="100%">ultralong phosphorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">waveguiding</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JUL</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">59</style></volume><pages><style face="normal" font="default" size="100%">13079-13085</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Room-temperature phosphorescence of metal and heavy atom-free organic molecules has emerged as an area of great potential in recent years. A rational design played a critical role in controlling the molecular ordering to impart efficient intersystem crossing and stabilize the triplet state to achieve room-temperature ultralong phosphorescence. However, in most cases, the strategies to strengthen phosphorescence efficiency have resulted in a reduced lifetime, and the available nearly degenerate singlet-triplet energy levels impart a natural competition between delayed fluorescence and phosphorescence, with the former one having the advantage. Herein, an organic helical assembly supports the exhibition of an ultralong phosphorescence lifetime. In contrary to other molecules, 3,6-phenylmethanone functionalized 9-hexylcarbazole exhibits a remarkable improvement in phosphorescence lifetime (&amp;gt;4.1 s) and quantum yield (11 %) owing to an efficient molecular packing in the crystal state. A right-handed helical molecular array act as a trap and exhibits triplet exciton migration to support the exceptionally longer phosphorescence lifetime.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">31</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;
</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;12.959&lt;/p&gt;
</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Goudappagouda</style></author><author><style face="normal" font="default" size="100%">Asokan, Kiran</style></author><author><style face="normal" font="default" size="100%">Nayak, Rashmi</style></author><author><style face="normal" font="default" size="100%">Krishnan, Retheesh</style></author><author><style face="normal" font="default" size="100%">Babu, Sukumaran Santhosh</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Tuning phosphorescence features of triphenylamines by varying functional groups and intermolecular interactions</style></title><secondary-title><style face="normal" font="default" size="100%">Dyes and Pigments</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Exciplex</style></keyword><keyword><style  face="normal" font="default" size="100%">fluorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">Phosphorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">triphenylamine</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">FEB</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">173</style></volume><pages><style face="normal" font="default" size="100%">107931</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Organic room temperature phosphorescent materials are known for their synthetic feasibility, tunable phosphorescence wavelength and lifetime, etc. Hence new design strategies have been applied on various fluorophores to improve phosphorescence features. Among those, triphenylamines are phosphorescence active due to the presence of nitrogen atom, propeller molecular structure, and intermolecular interactions in the crystal state. Here we have studied the room temperature phosphorescence of a series of triphenylamines with various functional groups. Detailed studies have shown that the phosphorescence can be fine-tuned by functional group modification. A long phosphorescence lifetime around 100 ms at room temperature in air can be achieved by the interplay of intermolecular interactions, singlet-triplet energy gap and extent of intersystem crossing using functional group variation. Interestingly, an exciplex assisted ultralong phosphorescence lifetime (more than 20 times) is observed for a combination of triphenylamine and naphthalenemonoimide in air.&lt;/p&gt;
</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;
</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;4.613&lt;/p&gt;
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