01896nas a2200241   4500008004100000022001400041245011600055210006900171260000800240300001100248490000800259520107900267653001301346653001701359653002001376653001901396100001801415700001801433700001801451700002301469700003001492856013201522       2020                        eng d  a0143-720800aTuning phosphorescence features of triphenylamines by varying functional groups and intermolecular interactions0 aTuning phosphorescence features of triphenylamines by varying fu  cFEB  a1079310 v1733 a<p>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.</p>
10aExciplex10afluorescence10aPhosphorescence10atriphenylamine1 aGoudappagouda1 aAsokan, Kiran1 aNayak, Rashmi1 aKrishnan, Retheesh1 aBabu, Sukumaran, Santhosh  uhttps://library.ncl.res.in/content/tuning-phosphorescence-features-triphenylamines-varying-functional-groups-and-intermolecular