Molecule-based Magnets Based on Dinuclear Metal Tetracarboxlates

犹他州大学化学系的Joel Miller博士得到了化学部无机、生物无机和有机金属化学计划的支持，该计划用于研究基于有机和分子的磁体(MBMS)，该磁体由两个互穿晶格组成，一个由混合的价、阳离子Ru羧酸盐组成，另一个由阴离子六氰基或硫氰酸根组成。这项研究的广泛目标是了解支配有机基磁体行为的基础科学，识别新的磁现象，并制造具有增强和可控的临界温度和矫顽场的有机基磁体。首先，我们将研究基于S=3/2混价Ru(II/III)羧酸盐的分子束结构。我们的目标是理解互穿晶格对这些系统的磁性影响。该项目将扩展到阴离子S=2 Ru(III)和S=3/2 Ru(II/III)硫酸盐和碳酸盐，扩展到Fe和Os类似物，以及这些金属的较不常见的氧化态。最终的目标是开发新的磁性有序材料，结合经典磁性材料所没有的特性。这项研究将从根本上了解分子和超分子有机磁体的磁性行为，并提供温度更稳定、磁场更高的磁体。可溶性分子磁体将推动薄膜磁光应用的发展。与国际化学家和物理学家的合作将为学生提供强有力的跨学科培训。

Dr. Joel Miller, Chemistry Department, University of Utah, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for the study of organic- and molecule based magnets (mbms) that consist of two interpenetrating lattices, one being composed of a mixed valent, cationic ruthenium carboxylate and the other an anionic hexacyano- or thiocyanatometalate. The broad goals of the research are to understand the fundamental science that governs behavior in organic-based magnets, to identify new magnetic phenomena, and to make organic-based magnets with enhanced and controllable critical temperatures and coercive fields. Initially, mbms based on S = 3/2 mixed-valent ruthenium(II/III) carboxylates will be studied. The goal is to understand the magnetic consequences of the interpenetrating lattices for these systems. The project will be extended to anionic S = 2 Ru(III) and S = 3/2 Ru(II/III) sulfate and carbonates, to Fe and Os analogues, and to less common oxidation states of these metals. The ultimate objective is the development of new magnetically ordered materials with combination of properties not observed for classical magnets.This research will provide a fundamental understanding of magnetic behavior in molecular and supramolecular organic magnets, as well as provide more temperature-stable, higher field magnets. Soluble molecular magnets will advance thin film magneto-optical applications. Collaborations with international chemists and physicists will provide a strong interdisciplinary training for students.