Recent advances in twisted intramolecular charge transfer (TICT) fluorescence and related phenomena in materials chemistry

Abstract

Twisted intramolecular charge transfer (TICT) is an electron transfer process that occurs upon photoexcitation in molecules that usually consist of a donor and acceptor part linked by a single bond.

A Facile Molecular Machine: Optically Triggered Counterion Migration by Charge Transfer of Linear Donor‐π‐Acceptor Phosphonium Fluorophores

“…[29] Thedication 9 shows two 31 Ps ignals (d = 23.4 and 22.0 ppm) because of the presence of two inequivalent Pn uclei, which demonstrate distinct long-range magnetic coupling ( 4 J P-P = 9.9 Hz). [30] Thec ompounds demonstrate high thermal stability according to TGA analysis ( Figure S2); with aminimum weight loss up to 300 8 8Cfor selected salts (2,4,5,8). [30] Thec ompounds demonstrate high thermal stability according to TGA analysis ( Figure S2); with aminimum weight loss up to 300 8 8Cfor selected salts (2,4,5,8).…”

“…[1] Thus,i ti sn ot surprising that donor-acceptor compounds hold aprominent position in materials science [2] and have been extensively used in organic electronics,i np articular for the development of organic electroluminescent devices, [3] solar cells, [4] field-effect transistors, [5] and nonlinear optical materials. [1] Thus,i ti sn ot surprising that donor-acceptor compounds hold aprominent position in materials science [2] and have been extensively used in organic electronics,i np articular for the development of organic electroluminescent devices, [3] solar cells, [4] field-effect transistors, [5] and nonlinear optical materials.…”

A Strategy of “Self‐Isolated Enhanced Emission” to Achieve Highly Emissive Dual‐State Emission for Organic Luminescent Materials

“…This demonstrated that, althought he twisted backbone was employed in DBBT-C0, the strong inter- www.chemeurj.org 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim molecular p-p stacking in aggregated states perhaps still occurred to quenchi ts emission seriously, finally leadingtothe appearance of ACQ phenomenon. [30][31][32][33] However,a fter the formation of aggregates in the THF/water mixtures, blue-shifted profiles were then achieved (Figure 3a nd Figure S3 in the Supporting Information). Thus, the effect of water fraction on photoluminescence quantum yields was also investigated ( Figure S4, Supporting Information) and similar to their PL intensity,g radually decreased F values were observed for DBBT-C0 when f w increased, whereas the recovered luminescentp erformance with increased F were finally achieved for the SIEE molecules.…”

Addressing Charge‐Transfer and Locally‐Excited States in a Twisted Biphenyl Push‐Pull Chromophore

“…All these molecules are characterized by at least one conformational degree of freedom strongly coupled to the charge-transfer process: the rotation of the amino group in aminobenzonitriles, the angle between the planes of the two anthryl or phenyl rings in bianthryl and biphenyl derivatives. Many of these systems display dual fluorescence in polar solvents [12][13][14][15]28,29] and show transient optical behavior strongly dependent on the solvent itself. Controlling the coupling of the charge-transfer process with nuclear degrees of freedom helps to single out the effects of solvation.…”