Calix[4]resorcinarene-based hyper-structured molecular thermally activated delayed fluorescence yellow-green emitters for non-doped OLEDs

Abstract

A series of novel hyper-structured molecular (HSM) thermally activated delayed fluorescent (TADF) emitters, in which the TADF units and host units are bound together into one inactive core through flexible linkages, were designed.

Fluorescent cyclophanes and their applications

“…These higher quantum yields are maintained at both high doping concentrations and in concentrated solution, proving that cyclization is an effective strategy for suppressing fluorescent quenching. Other OLEDs devices fabricated on the basis of emissive resorcinarenes, 315 CPPs, 316 cyclometaphenylenes, 19,317 calixarenes 82,318 or cyclophanes incorporating dibenzofuran, 319 carbazole, 320 fluorene, 321 dibenzo[ a , j ]phenazine units 322 have also been reported.…”

Copper(I)-Catalyzed Alkyne–Azide Cycloaddition (CuAAC) “Click” Reaction: A Powerful Tool for Functionalizing Polyhydroxylated Platforms

“…74 In platforms of the resorcinarene type, chromophores and compounds with thermally activated delayed fluorescence (TADF) were incorporated (Scheme 8). Liu et al 12 in 2016 and Wang et al in 2020 79 reported resorcinarene conjugates obtained with click chemistry (CuAAC) using as a functionalized platform octaalkylcalix [4] of compound 59, it was obtained with a yield of 40% compared to compound 60, which exhibited a yield of 75%. This type of compound can have applications in the generation of new photosensitive materials.…”

“…74 In platforms of the resorcinarene type, chromophores and compounds with thermally activated delayed fluorescence (TADF) were incorporated (Scheme 8). Liu et al 12 in 2016 and Wang et al in 2020 79 reported resorcinarene conjugates obtained with click chemistry (CuAAC) using as a functionalized platform octaalkylcalix [4]resorcinarene 58. In both syntheses, the copper(I) species was used directly, using CuBr and PMDETA stabilizer in DMF for 24 h. For the case of compound 59, it was obtained with a yield of 40% compared to compound 60, which exhibited a yield of 75%.…”

“…In both syntheses, the copper(I) species was used directly, using CuBr and PMDETA stabilizer in DMF for 24 h. For the case Scheme 8. Derived Resorcinarene with Chromophores and Compounds with Thermally Activated Delayed Fluorescence (TADF)79…”

A new benzothiazin-functionalized calix[4]arene-based fluorescent chemosensor for the selective and sensitive detection of Co2+ ion

“…Fluorescence and chromogenic techniques are considered sensitive, selective, and economical methods for the detection of charged or neutral species at a low level [5][6][7]. Recently, the numbers of uorophores and chromophores have been developed based on the supramolecular system as well as small molecules [8][9][10][11][12][13][14][15][16][17]. Among supramolecular based sensors, Calixarene-based molecules have received intense attention in the last few years in different elds of applications as carriers, sensors, and catalyst [14,[18][19][20][21][22][23][24].…”