Twisted intramolecular charge transfer TICT

Gormin D, Kasha M (1988) Triple fluorescence in aminosalicylates. Modulation of normal, proton-transfer, and twisted intramolecular charge-transfer (TICT) fluorescence by physical and chemical perturbations. Chem Phys Lett 153 574-576... 

Rettig W, Lapouyade R (1994) Fluorescence probes based on twisted intramolecular charge transfer (TICT) states and other adiabatic photoreactions. Topics in fluorescence spectroscopy 4 109-149... 

Grabowski ZG, Dobkowski J (1983) Twisted intramolecular charge transfer (TICT) excited states energy and molecular structure. Pure Appl Chem 55(2) 245-252... 

Bulgarevich DS, Kajimoto O, Hara K (1995) High-pressure studies of the viscosity effects on the formation of the twisted intramolecular charge-transfer (TICT) state in 4,4 -diaminodi-phenyl sulfone (DAPS). J Phys Chem 99(36) 13356—13361... 

Jiang Y (1994) pH Dependence of the twisted intramolecular charge transfer(TICT) of p-N, N-dimethylaminobenzoic acid in aqueous solution. J Photochem Photobiol A Chem 78 (3) 205-208... 

Rettig W. (1982) Application of Simplified Microstructural Solvent Interaction Model to the Solvatochromism of Twisted Intramolecular Charge Transfer (TICT) States, /. Mol. Struct. 8, 303-327. 

Rettig W. and Lapouyade R. (1994) Fluorescent Probes Based on Twisted Intramolecular Charge Transfer (TICT) States and Other Adiabatic Reactions, in Lakowicz J. R. (Ed.), Topics in Fluorescence Spectroscopy, Vol. 4, Probe Design and Chemical Sensing, Plenum Press, New York, pp. 109-149. 

Fluorescence Probes Based on Twisted Intramolecular Charge Transfer (TICT) States and Other Adiabatic Photoreactions... 

W. Rettig and G. Wermuth, The kinetics of formation of twisted intramolecular charge transfer (TICT) states in p-substituted dialkylanilines Consequences of conical intersections along the reaction coordinate, /. Photochem. 28, 351 (1985). 

Z. R. Grabowski, K. Rotkiewicz, and A. Siemiarczuk, Dual fluorescence of donor-acceptor molecules and the twisted intramolecular charge transfer (TICT) states, J. Lumin. 18, 420 (1979). 

W. Rettig and W. Baumann, Luminescent and nonluminescent twisted intramolecular charge transfer (TICT) states Dipole moments and applications, in Photochemistry and Photophysics, Vol. 6 (J. F. Rabek, ed.), pp. 79-134, CRC Press, Boca Raton, Florida (1992). 

K. A. Al-Hassan and T. Azumi, The role of free volume in the twisted intramolecular charge transfer (TICT) emission of dimethylaminobenzonitrile and related compounds in rigid polymer matrices. Chem. Phys. Lett. 146, 121 (1988). 

V,/V-Dimethylamino)benzonitrile (DMABN) and its derivatives, as a class of organic donor-acceptor compounds, exhibit dual fluorescence, one related to the local excited state ( B band) and the other ascribed to the twisted intramolecular charge transfer (TICT) state ( A band).17 As expected, compound 818 exhibits dual fluorescence, showing two fluorescence bands centered at 350 and 432 nm, which can be ascribed to the corresponding band (from the local excited state) and A band (from the TICT state), respectively. After oxidation of TTF unit in 8, the fluorescence intensity of A band decreases while that of band increases slightly. As expected, further reduction of TTF" + into neutral TTF unit leads to the restoration of the fluorescence spectrum of 8. Therefore, the dual fluorescence spectrum of 8 can be reversibly modulated by redox reactions of TTF unit in 8. 

Fluorescence properties of 1,2-di-9-anthrylethelenes, 177 trans-dianthrylethylenes, 184 symmetrical cis-, 2-diarylethelenes, 177 twisted intramolecular charge transfer (TICT) state, 184... 

In this article, the formation and characteristics of a new class of excited states, the twisted intramolecular charge transfer (TICT) states, have been dealt with from various theoretical and experimental viewpoints. The main electronic features accompanying TICT state formation are... 

Figure 10 Potential energy diagram for emission from normal planar (NP) and twisted intramolecular charge transfer (TICT) excited states. The charge-separated state is stabilized by twisting and by the polarity of the environment.

Lumophore-receptor systems where the two components are sterically held orthogonal can be considered to have a virtual Co spacer between the lumophore and receptor. Thus these systems can be approximately considered as a PET system. A deeper analysis would take twisted intramolecular charge transfer (TICT) states [116] into account whose thermodynamics is, unsurprisingly, very similar to that of PET systems. 

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