期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 60, 期 8-9, 页码 2181-2184出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2003.11.012
关键词
2.3-diaminopyridine; iodine; electronic; vibrational; spectra
类别
The char.-e-transfer interaction of 2,3-diaminopyridine (DAPY) and iodine has been investigated spectrophotometrically in the solvents chloroform and dichloromethane at room temperature. The results indicate the fort-nation of 1:2 charge-transfer complex in each solvent with the observation of the two characteristic absorptions for triiodide ion around 355 and 295 nm. The iodine complex is formulated as [(DAPY)I](+ .) I-3(-). The formation of the triiodide ion, I-3(-), is further confirmed by the observation of the characteristic bands for non-linear I-3(-) ion with C-2v symmetry at 151 and 132 cm(-1) assigned to v(as)(I-I) and v(s)(I-I) of the I-I bonds and at 61 cm(-1) due to bending delta(I-3(-)). The mid infrared spectra of (DAPY) and triiodide complex are also obtained and assigned. (C) 2003 Elsevier B.V. All rights reserved.
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