MULTIPLE FLUORESCENCES .2. NEW SCHEME FOR 4-(N,N-DIMETHYLAMINO)BENZONITRILE INCLUDING PROTON-TRANSFER
MULTIPLE FLUORESCENCES .2. NEW SCHEME FOR 4-(N,N-DIMETHYLAMINO)BENZONITRILE INCLUDING PROTON-TRANSFER
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DOI：
10.1021/ja00420a010
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发表时间：
1976-01-01
影响因子：
15
通讯作者：
DODIUK, H
中科院分区：
文献类型：
--
作者：
KOSOWER, EM;DODIUK, H
Long-wavelengthemission from 4-(/V, Af-dimethylamino) benzonitrile is assigned to a protonated molecule (deuteri-um isotope effect). Utilizing solvent polarity parameters, three otheremissions are identified: planar monomer, perpendicu-lar monomer, and dimer. The protonated emitting species occurs only in proton-donor solvents; the ratio of monomer protonated molecule emissions is viscosity and wavelength dependent.The “abnormal” emission from 7V-methyl-2-(Ar-phenylamino)-6-naphthalenesulfonate in glycerol has been identi-fied as that of a protonated molecule. la The expected emission appeared only if the photochemical conversionto 2 were avoided, consistent with protonation occurring in the S* o state, and vibrational relaxation in a high-viscosity sol-vent being sufficiently slow to encounter competitionfrom a proton-transfer process, that converting structure 1 into structure 2.
