554-68-7Relevant articles and documents
Supramolecular chromotropism of the crystalline phases of 4,5,6,7-tetrafluorobenzo-2,1,3-telluradiazole
Cozzolino, Anthony F.,Whitfield, Pamela S.,Vargas-Baca, Ignacio
, p. 17265 - 17270 (2010)
The remarkable effect that secondary bonding interactions can have on the macroscopic properties of a material is illustrated by two polymorphs of the title compound. The phase which is most stable under ambient pressure and temperature consists of puckered supramolecular ribbon polymers assembled by Te - N secondary bonding interactions and displays a characteristic red-orange color. A second yellow phase consists of ribbons with alternating short and long intermolecular Te - N secondary bonding distances and is metastable; at 127 °C the material undergoes an exothermic irreversible transition to the red polymorph. A third phase consists of pyridine-solvated supramolecular dimers; it is also yellow and transforms into the red phase after the crystals effloresce. Computational DFT studies indicate that the observed changes in optical properties are related to intermolecular mixing of π orbitals enabled by the supramolecular interactions and the symmetry of the supramolecular synthon.
Synthesis and some properties of transition metal complexes based on the octathiophophetane ammonium salts
, p. 434 - 441 (2014)
Cyclic octathiotetraphosphetanes, and speciafically their ammonium salt, represent novel polyfunctional heterocyclic ligands that are valuable in the development of organometallic and coordinated chemistry. Coordination features of octathiotetraphosphetan
The dendritic effect in molecular recognition: Ferrocene dendrimers and their use as supramolecular redox sensors for the recognition of small inorganic anions
Valerio,Fillaut,Ruiz,Guittard,Blais,Astruc
, p. 2588 - 2589 (1997)
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Design and characterization of [(Et)3?N-H]FeCl4 as a nanomagnetic ionic liquid catalyst for the synthesis of xanthene derivatives under solvent-free conditions
Ezabadi, Ali,Salami, Masoumeh
, p. 1287 - 1303 (2022/01/24)
The triethylamine-based nanomagnetic ionic liquid, [(Et)3?N-H]FeCl4, was synthesized, and its structural and chemical characteristics were detected. The thermogravimetric analysis indicated its high thermal stability with a decomposi
Total Structure Determination of the Largest Alkynyl-Protected fcc Gold Nanocluster Au110and the Study on Its Ultrafast Excited-State Dynamics
Wang, Jia-Qi,Shi, Shuang,He, Rui-Lin,Yuan, Shang-Fu,Yang, Gao-Yuan,Liang, Gui-Jie,Wang, Quan-Ming
supporting information, p. 18086 - 18092 (2020/12/02)
Great attention has been paid to nanoclusters having face-centered-cubic (fcc) metal kernels, because of the similarity of metal packing to that of bulk gold. So far, there is no precedent example of an all-alkynyl-protected fcc gold nanocluster with more than 100 gold atoms. We report the synthesis and total structure determination of an alkynyl-protected gold nanocluster [NEt3H]2[Au110(p-CF3C6H4CC)48] (Au110). It has an fcc Au86 kernel with 24 peripheral Au(CCR)2 staples. The Au86 kernel consists of six close packing layers in the pattern of Au6:Au16:Au21:Au21:Au16:Au6. Electronic absorption spectroscopy shows Au110 has a molecular-like discrete electronic structure, and transient absorption experiments reveal its nonmetallic nature.
A Discrete Dichloride Tetrahydrate Trapped by a Cyclopropenium Cation: Structure and Spectroscopic Properties
Abdelbassit, Mohammed S.,Crittenden, Deborah L.,Curnow, Owen J.,Ferreras, Manuel
, p. 927 - 932 (2020/06/01)
A discrete dichloride tetrahydrate cluster, [Cl2(H2O)4]2?, was obtained as a salt of the bis(diphenylamino)diethylamino cyclopropenium cation [C3(NPh2)2(NEt2)]+ and characterized by single-crystal X-ray diffraction and infrared spectroscopy. This chloride–chloride ion-pair cluster consists of a [Cl2(H2O)2]2? square with opposite edges bridged by water molecules to give a chair-like structure of the non-hydrogen atoms. The solid-state structure is essentially the same as the calculated gas-phase structure. Infrared spectra were also collected on the deuterium analogue [Cl2(D2O)4]2?. Computational studies were carried out on gas-phase [Cl2(H2O)4]2? to confirm the infrared band assignments in the solid state. The structure and infrared spectrum are consistent with the discrete nature of the cluster.