Four-Center Oxidation State Combinations and Near-Infrared Absorption in [Ru(pap)(Q)<sub>2</sub>]<sup><i>n</i></sup>(Q=3,5-Di-<i>tert</i>-butyl-<i>N</i>-aryl-1,2-benzoquinonemonoimine, pap=2-Phenylazopyridine)
作者:Dipanwita Das、Hemlata Agarwala、Abhishek Dutta Chowdhury、Tuhin Patra、Shaikh M. Mobin、Biprajit Sarkar、Wolfgang Kaim、Goutam Kumar Lahiri
DOI:10.1002/chem.201204620
日期:2013.6.3
an EPR signal at g=1.996. The electronic transitions of the complexes 1n–4n (n=+2, +1, 0, −1, −2) in the UV, visible, and NIR regions, as determined by using spectroelectrochemistry, have been analyzed by TD‐DFT calculations and reveal significant low‐energy absorbance (λmax>1000 nm) for cations, anions, and neutral forms. The experimental studies in combination with DFT calculations suggest the dominant
复数级[Ru(pap)(Q)2 ] n([ 1 ] n – [ 4 ] n ; n = + 2,+1,0,-1,-2)包含四个氧化还原非清白实体:一个钌离子,2- phenylazopyridine(PAP),和两个ö -iminoquinone部分,Q = 3,5-二-叔丁基- ñ -芳基-1,2- benzoquinonemonoimine(芳基= C 6 H ^ 5(1 +); m-(Cl)2 C 6 H 3(2 +); m-(OCH 3)2C 6 H 3(3 +); m-(t Bu)2 C 6 H 3(4 +))。确定代表性化合物[ 1 ] ClO 4的晶体结构,确定了ctt异构体形式的结晶,即相对于两个Q配体的O和N供体的相互取向而言是顺式和反式,并且偶氮N原子反式到Q.的O-供体的敏C O(平均值:1.299(3)),C N(平均值:1.346(4)a)和帧内环C C(元;平均值:1