Near-infrared absorbing Ru(<scp>ii</scp>) complexes act as immunoprotective photodynamic therapy (PDT) agents against aggressive melanoma
作者:Liubov M. Lifshits、John A. Roque III、Prathyusha Konda、Susan Monro、Houston D. Cole、David von Dohlen、Susy Kim、Gagan Deep、Randolph P. Thummel、Colin G. Cameron、Shashi Gujar、Sherri A. McFarland
DOI:10.1039/d0sc03875j
日期:——
(3IL) excitedstate for high singlet oxygen (1O2) quantum yields (69–93%), which was only possible when the photosensitizing 3IL states were lower in energy than the lowest triplet metal-to-ligand charge transfer (3MLCT) excited states that typically govern Ru(II) polypyridyl photophysics. PDT treatment with 2 elicited a pro-inflammatory response alongside immunogenic cell death in mouse B16F10 melanoma
Water Oxidation with Mononuclear Ruthenium(II) Polypyridine Complexes Involving a Direct Ru<sup>IV</sup>═O Pathway in Neutral and Alkaline Media
作者:Yosra M. Badiei、Dmitry E. Polyansky、James T. Muckerman、David J. Szalda、Rubabe Haberdar、Ruifa Zong、Randolph P. Thummel、Etsuko Fujita
DOI:10.1021/ic401023w
日期:2013.8.5
catalytic wateroxidation mechanism proposed for many single-site ruthenium complexes proceeds via the nucleophilic attack of a water molecule on the RuV═O species. In contrast, Ru(II) complexes containing 4-t-butyl-2,6-di-1′,8′-(naphthyrid-2′-yl)-pyridine (and its bisbenzo-derivative), an equatorial water, and two axial 4-picolines follow the thermodynamically more favorable “directpathway” via [RuIV═O]2+
提出了许多单站点的钌络合物催化水氧化机制通过一个水分子在Ru的亲核攻击进行V = O物种。相反,Ru(II)配合物包含4-叔丁基-2,6-di-1',8'-(萘并-2'-基)-吡啶(及其双苯并衍生物),赤道水和两个轴向-4-甲基吡啶按照通过的[Ru热力学更有利的“直接途径” IV = O] 2+,这避免了较高氧化态的[Ru V = O] 3+在中性和基本媒体中。我们的实验和理论结果集中在pH依赖的起始催化电位上,该电位指示PCET驱动的低能途径形成具有O–O键(例如[ Ru III –OOH] 2+和[ Ru IV -OO] 2+在低于钌的施加电位)V = O /茹IV = O夫妇明确支持这样的机制。然而,在[Ru(tpy)(bpy)(OH 2)] 2+和[Ru(tpy)(bpm)(OH 2)] 2+的情况下,Ru V的形成在形成O-O键之前,似乎需要═O物种。所讨论的配合物为水氧化提供了