| 1207524-41-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异喹啉及其衍生物
• CAS: 1207524-41-1
• 化学式: C₉₀H₈₅N₇O₇Zn
• 分子量: 1442.1
• InChiKey: TWAQLOGZCCBXRI-QTVRWTOJSA-N

反应信息

• 作为产物：
  描述：

  在 zinc diacetate 、 水 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 生成
  参考文献：
  名称：

  State-Selective Electron Transfer in an Unsymmetric Acceptor−Zn(II)porphyrin−Acceptor Triad: Toward a Controlled Directionality of Electron Transfer from the Porphyrin S₂ and S₁ States as a Basis for a Molecular Switch

  摘要：

  A series of Zn(II) porphyrin (ZnP) compounds covalently linked to different electron acceptor units, naphthaleneimide (NI) and naphthalenedimide (NDI), are reported. The aim was to demonstrate a state-selective direction of electron transfer, where excitation to the lowest excited S-1 state of the porphyrin (Q-band excitation) would give electron transfer to the NDI unit, while excitation to the higher S-2 state (Soret-hand excitation) would give electron transfer to the NI unit. This would constitute a basis for an opto-electronic Switch in which the direction of electron transfer and the resulting dipole moment can be controlled by using light input of different color. Indeed, electron transfer from the S-1 state to NDI Occurred in solvents of both high and low polarity, whereas no electron transfer to NDI was observed from the S-2 state. With NI as acceptor instead, very rapid (tau = 200-400 fs) electron transfer from the S-2 state occurred in all solvents. This was followed by an ultrafast (tau approximate to 100 fs) recombination to Populate the porphyrin S-1 state in nearly quantitative yield. The charge-separated state ZnP+NI- was spectroscopically observed, and evidence was obtained that recombination Occurred from a vibrationally excited ("hot") ZnP+NI- state in the more polar solvents. In these solvents, the thermally relaxed ZnP+NI- state lies at lower energy than the S-1 state so that further charge separation occurred from S-1 to form ZnP+NI-. This resulted in a highly unusual "ping-pong" sequence where the reaction went back and forth between locally excited ZnP states and charge-separated states: S-2 double right arrow ZnP+NI"hot"- double right arrow S-1 double right arrow ZnP+NI- double right arrow S-0. The electron transfer dynamics and its solvent dependence are discussed, as well as the function of the present Molecules as molecular switches.

  DOI：

  10.1021/jp907824d