Influence of quenchers on excited complexes upon triplet-triplet annihilation of tetrapyrrole molecules in liquid solutions

2000 ◽  
Vol 34 (3) ◽  
pp. 159-163 ◽  
Author(s):  
V. V. Sapunov
Keyword(s):  
Liquid Solutions ◽  
Excited Complexes ◽  
Triplet Triplet Annihilation

Molecular vibration assisted triplet-triplet annihilation nir-upconversion luminescence of fluorescein

2019 ◽  
Vol 96 ◽  
pp. 109286
Author(s):  
Abhishek Kumar ◽  
Luís Pinto da Silva ◽  
Joaquim C.G. Esteves da Silva ◽  
Kaushal Kumar
Keyword(s):  
Upconversion Luminescence ◽  
Molecular Vibration ◽  
Triplet Triplet Annihilation

Room Temperature Phosphorescence vs Triplet–Triplet Annihilation in N-Substituted Acridone Solids

2021 ◽  
pp. 6431-6438
Author(s):  
Ehsan Hamzehpoor ◽  
Cory Ruchlin ◽  
Yuze Tao ◽  
Jorge Eduardo Ramos-Sanchez ◽  
Hatem M. Titi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Triplet Triplet Annihilation

scholarly journals Intramolecular Triplet–Triplet Annihilation Photon Upconversion in Diffusionally Restricted Anthracene Polymer

2021 ◽  
Author(s):  
Fredrik Edhborg ◽  
Hakan Bildirir ◽  
Pankaj Bharmoria ◽  
Kasper Moth-Poulsen ◽  
Bo Albinsson
Keyword(s):  
Annihilation Photon ◽  
Triplet Triplet Annihilation

scholarly journals Effects of Temperature and Host Concentration on the Supramolecular Enantiodifferentiating [4 + 4] Photodimerization of 2-Anthracenecarboxylate through Triplet-Triplet Annihilation Catalyzed by Pt-Modified Cyclodextrins

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1502 ◽  
Author(s):  
Ming Rao ◽  
Wanhua Wu ◽  
Cheng Yang
Keyword(s):  
Light Emitting Diode ◽  
Temperature Dependency ◽  
Light Emitting ◽  
Modified Cyclodextrins ◽  
Direct Irradiation ◽  
Visible Light Driven ◽  
Significant Temperature ◽  
Effects Of Temperature ◽  
532 Nm ◽  
Triplet Triplet Annihilation

Visible-light-driven photocatalytic supramolecular enantiodifferentiating dimerization of 2-anthracenecarboxylic acid (AC) through triplet-triplet annihilation (TTA), mediated by the Schiff base Pt(II) complex (Pt-1, Pt-2, and Pt-3) was studied. The host concentration and the temperature effects on the stereoselectivity were comprehensively investigated. Increasing the concentration of sensitizers/hosts significantly enhanced the conversion of the photoreaction but led to reduced enantioselectivities of the chiral photodimers 2 and 3 when the photoreaction was triggered by a 532 nm laser, which was in contrast with the results obtained by direct irradiation of AC with a 365 nm light-emitting diode (LED) lamp, due to the aggregation of the sensitizer/host in water. The cyclization of AC through triplet-triplet annihilation displayed significant temperature dependency when Pt-3 was employed as the sensitizer/host. Increasing the temperature from 0 °C to 30 °C with 5% equiv. of Pt-3 led to a great increase of the ee of 2 from 2.1% to 31.6%. However, hardly any temperature dependency was observed when the photodimerization was mediated by other sensitizers and/or hosts, or the photoreaction was triggered directly with a 365 nm LED lamp.

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