Aryl-modified ruthenium bis(terpyridine) complexes:: Quantum yield of 1O2 generation and photocleavage on DNA
Aryl-modified ruthenium bis(terpyridine) complexes:: Quantum yield of 1O2 generation and photocleavage on DNA
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DOI：
10.1016/j.jphotochem.2005.06.008
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发表时间：
2006-01-25
影响因子：
4.3
通讯作者：
Zhang, BW
中科院分区：
文献类型：
--
作者：
Ding, HY;Wang, XS;Zhang, BW
研究了6个在三联吡啶4 '位分别引入1个或2个2-萘基、1-芘基或9-蒽基的Ru（II）双（tpy）（tpy = 2，2'：6.2”-三联吡啶）配合物的O-1（2）量子产率和对DNA的光裂解能力.对于萘基和芘基修饰的配合物，最低能量激发态是（MLCT）-M-3，因此它们的行为与母体配合物[Ru（tPY）（2）]（2+）非常相似。具有非常低的O-1（2）生成量子产率。相比之下，蒽基修饰的配合物的最低激发态是蒽定域的（3）pi pi（*）态，因此，它们表现出极高的O-1（2）生成量子产率（双取代和单取代配合物分别为0.96和0.71）和对小牛胸腺DNA的强光损伤能力，表明它们在O-1（2）-参与的过程中有很好的应用前景，例如DNA光切割。(c)2005 Elsevier B. V.保留所有权利。
Six Ru(II)bis(tpy) (tpy = 2,2':6.2"-terpyridine) complexes, functionalized with one or two 2-naphthyl, 1-pyrenyl, or 9-anthracenyl at 4'-position of terpyridine respectively, were investigated with emphasis on their O-1(2) generation quantum yields and photocleavage capabilities on DNA. For naphthyl and pyrenyl modified complexes, the lowest energy excited state is (MLCT)-M-3, and therefore they behave very similarly to the parent complex, [Ru(tPY)(2)](2+). having very low O-1(2) generation quantum yields. In contrast, for anthracenyl modified complexes, the lowest energy excited state is anthracene-localized (3)pi pi(*) state, as a result, they exhibit extremely high O-1(2) generation quantum yields (0.96 and 0.71 for bis- and mono-substituted complexes, respectively) and potent photodamage abilities on calf thymus DNA, suggesting their promising applications in O-1(2)-involved processes, such as DNA photocleavage. (c) 2005 Elsevier B.V. All rights reserved.