Near-Infrared Light Activated Release of Nitric Oxide from Designed Photoactive Manganese Nitrosyls: Strategy, Design, and Potential as NO Donors
作者:Aura A. Eroy-Reveles、Yvonne Leung、Christine M. Beavers、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ja710265j
日期:2008.4.1
myoglobin with 780 nm light. The various strategies for synthesizing photosensitive metal nitrosyls have been discussed to establish the merits of the present approach. The results of the present study confirm that proper ligand design is a very effective way to isolate photoactive manganese nitrosyls that could be used to deliver NO to biological targets under the control of NIR light.
衍生自五齿配体 N,N-双(2-吡啶基甲基)胺-N-乙基-2-喹啉-2-甲酰胺的两种新锰配合物,PaPy2QH,其中 H 是可解离的质子),即 [Mn(PaPy2Q)( NO)]ClO4 (2) 和 [Mn(PaPy2Q)(OH)]ClO4 (3) 已经合成并进行了结构表征。Mn(III) 络合物 [Mn(PaPy2Q)(OH)]ClO4 (3),虽然对分子氧不敏感,但与一氧化氮 (NO) 反应生成亚硝酰基络合物 [Mn(PaPy2Q)(NO)]ClO4 (2)通过还原亚硝基化。这种抗磁性 Mn-NO}6 亚硝酰基在 1725 cm-1 处显示出 nuNO,并且高度溶于水,λmax 位于 500 和 670 nm。将 2 溶液暴露于近红外 (NIR) 光 (810 nm, 4 mW) 会导致栗色溶液漂白并通过 NO 敏感电极检测游离 NO。量子产率 2 (Phi = 0.694 +/- 0