- Conversion of Arylboronic Acids to Tetrazoles Catalyzed by ONO Pincer-Type Palladium Complex
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A convenient synthesis of a library of tetrazoles through a novel and operationally simple protocol effecting the direct conversion of arylboronic acids catalyzed by a new ONO pincer-type Pd(II) complex under mild reaction conditions using the readily available reagents is reported. The palladium complex was reused up to four cycles in an open-flask condition.
- Vignesh, Arumugam,Bhuvanesh, Nattamai S. P.,Dharmaraj, Nallasamy
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p. 887 - 892
(2018/06/15)
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- Synthesis, structures, and photoinduced electron transfer reaction in the 9,9′-spirobifluorene-bridged bipolar systems
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A series of 9,9′-spirobifluorene-bridged bipolar compounds DnAm bearing various n:m ratios for triarylamine (D) versus 1,3,4-oxadiazole- conjugated oligoaryl moiety (A) have been synthesized to investigate the corresponding photoinduced electron transfer (PET) property. The excitation behaviors were probed by steady-state absorption, emission, fluorescence solvatochromism, and femtosecond fluorescence up-conversion spectroscopy. The overall reaction dynamics can be rationalized by the rate of PET, in combination with solvent relaxation dynamics. It was found that the rate of PET is dependent on the anchored D/A ratio. The rate of D1A1 and D2A1 was resolved to be ~2.44 × 1012 and 2.32 × 1012 s -1, respectively, while it is irresolvable in D1A2 and D2A2 (>6.6 × 1012 s-1). In another approach, based on the comprehensive X-ray data, cyclic voltammetry, and absorption/emission spectra, the rate of photoinduced electron transfer was also qualitatively estimated. Fair comparisons were made between experimental and theoretical approaches to gain detailed insight into the PET for the titled systems.
- Wong, Ken-Tsung,Ku, Sung-Yu,Cheng, Yi-Ming,Lin, Xiauo-Yun,Hung, Ying-Yueh,Pu, Shih-Chieh,Chou, Pi-Tai,Lee, Gene-Hsiang,Peng, Shie-Ming
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p. 456 - 465
(2007/10/03)
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- USE OF SPIRO COMPOUNDS AS LASER DYES
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Use of spiro compounds of formula (I), where K and K are, independently of one another, conjugated systems, as a laser dye.
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