Development of Molecule-Based Photonic Devices

Chemists can synthesize molecules as they design and analyze their physical and chemical properties at the single molecular level. Many researchers in the materials chemistry think, however, that construction of supramolecular architectures in solids is very important, since the symmetry and periodic nature of the crystals are essential for bulk conducting/magnetic/photonic materials. We assume that crystals could be prepared from molecules, just like molecules from atoms, according to the crystal-design or crystal-engineering techniques, but difficulties have often been claimed in applying usually weak intermolecular interactions to the control of mutual geometries between molecules.

Development of Molecule-Based Photonic Devices Department of Applied Physics and Chemistry Associate Professor Takayuki ISHIDA ishi@pc.uec.ac.jp http://ttf.pc.uec.ac.jp/
Chemists can synthesize molecules as they design and analyze their physical and chemical properties at the single molecular level. Many researchers in the materials chemistry think, however, that construction of supramolecular architectures in solids is very important, since the symmetry and periodic nature of the crystals are essential for bulk conducting/magnetic/photonic materials. We assume that crystals could be prepared from molecules, just like molecules from atoms, according to the crystal-design or crystal-engineering techniques, but difficulties have often been claimed in applying usually weak intermolecular interactions to the control of mutual geometries between molecules.
Figure 1. Photo-induced magnetization of a [Fe(N₃)₂(pyrimidine)]-based antiferromagnet with TN = 39 K		Figure 2. [MCl₂(pm)] moiety with a 4₁ screw symmetry in the crystal of [MCl₂(pm)₂] (M = Fe, Co; pm = pyrimidine). They were characterized as weak ferromagnets below 6.4 and 4.5 K for M = Fe and Co, respectively.