Photochromism and Photomagnetism of a 3d鈥?f Hexacyanoferrate at Room Temperature

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• 作者：Li-Zhen Cai ; Qing-Song Chen ; Cui-Juan Zhang ; Pei-Xin Li ; Ming-Sheng Wang ; Guo-Cong Guo
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：September 2, 2015
• 年：2015
• 卷：137
• 期：34
• 页码：10882-10885
• 全文大小：313K
• ISSN：1520-5126

文摘

Polycyanometallate compounds with both photochromism and photomagnetism have appealing applications in optical switches and memories, but such optical behaviors were essentially restricted to the cryogenic temperature. We realized, for the first time, the photochromism and photomagnetism of 3d鈥?f hexacyanoferrates at room temperature (RT) in [Eu^III(18C6)(H₂O)₃]Fe^III(CN)₆路2H₂O (18C6 = 18-crown-6). Photoinduced electron transfer (PET) from crown to Fe(III) yields long-lived charge-separated species at RT in air in the solid state and also weakens the magnetic susceptibility significantly. The PET mechanism and changing trend of photomagnetism differ significantly from those reported for known 3d鈥?f hexacyanoferrates. This work not only develops a new type of inorganic鈥搊rganic hybrid photochromic material but opens a new avenue for RT photomagnetic polycyanometallate compounds.