Fluorescence, charged cyclodextrins

K. Hamasaki, H. Ikeda, A. Nakamura, A. Ueno, F. Toda, I. Suzuki, andT. Osa, Fluorescence sensors of molecular recognition. Modified cyclodextrins capable of exhibiting guest-responsive twisted intramolecular charge transfer fluorescence, /. Am. Chem. Soc. 775,5035-5040(1993). 

Absorption and fluorescence spectra of 7-aminocoumarin derivatives have been recorded and the photophysics of coumarin inclusion complexes with 0- and y-cyclodextrins investigated. Solvent effects on the photophysical behaviour of pyrrolocoumarin derivatives are similar to those on the psorolens . Vibronic exciton bands and the absorption spectra of Eosin Y dimers have been analysed theoretically and compared with experimental data. Picosecond spectroscopic studies have been made on the ionic photodissociation dynamics of malachite green leucocyanide . The lowest state produces ions within 0.1 to 0.5 ns whilst for higher states 6-13 ps are sufficient for the development of charge separation. The photophysics of crystal violet in a series of n-... 

Figure 2 DMAB-/ -cyclodextrin for the detection of guest binding by twisted intramolecular charge-transfer (TICT) fluorescence [7,8]...

Al-Hassan, K., Klein, Uwe, K. A., and Suwaiyan, A, Normal and twisted intramolecular charge-transfer fluorescence of 4-dimethylaminobenzonitrile in a-cyclodextrin cavities, Chem. Phys. Lett., 212, 581,1993. 

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