Journal ArticleDOI
Bistability and the Phase Transition in 1,3,2-Dithiazolo[4,5-b]pyrazin-2-yl
Jaclyn L. Brusso,Owen P. Clements,Robert C. Haddon,Mikhail E. Itkis,Alicea A. Leitch,Richard T. Oakley,Robert W. Reed,John F. Richardson +7 more
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TLDR
The structural interconversion is suggested to proceed via the cooperative breaking and making of intermolecular S- - -N interactions and an inversion symmetry-preserving "domino cascade" of the pi-stacked rings.Abstract:
The molecular radical 1,3,2-dithiazolo[4,5-b]pyrazin-2-yl (PDTA) exhibits magnetic bistability just above room temperature, undergoing a well-defined hysteretic phase change with TC↓ = 297(1) K and TC↑ = 343(1) K. The crystal structures of the two phases of PDTA have been determined by single-crystal X-ray diffraction at 323(2) K. LT-PDTA consists of diamagnetic (S = 0) nearly superimposed π-dimer stacks, while that of HT-PDTA comprises slipped stacks of π-radicals (S = 1/2). The structural interconversion is suggested to proceed via the cooperative breaking and making of intermolecular S- - -N interactions and an inversion symmetry-preserving “domino cascade” of the π-stacked rings.read more
Citations
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Laser-Induced Cooperative Transition in Molecular Electronic Crystal.
Yong Hu,Dasharath Adhikari,Andrew Tan,Xi Dong,Taishan Zhu,Xiaoyu Wang,Yulong Huang,Travis Mitchell,Ziheng Yao,Ziheng Yao,Nathan Dasenbrock-Gammon,Elliot Snider,Ranga Dias,Chuankun Huang,Richard H. J. Kim,Ian Neuhart,Ahmed H. Ali,Jiawei Zhang,Hans A. Bechtel,Michael C. Martin,Stephanie N. Gilbert Corder,Feng Hu,Zheng Li,Jason N. Armstrong,Jigang Wang,Mengkun Liu,Jason B. Benedict,Eva Zurek,Ganapathy Sambandamurthy,Jeffrey C. Grossman,Pengpeng Zhang,Shenqiang Ren +31 more
TL;DR: In this paper, a dynamic and cooperative phase in potassium-7,7,8,8-tetracyanoquinodimethane (K-TCNQ) with the control of pulsed electromagnetic excitation is demonstrated.
Journal ArticleDOI
7 Oxygen, sulfur, selenium and tellurium
TL;DR: A review of the literature during 2004 concerning the chemistry of the Group 16 elements is presented in this article, where an emphasis is placed on molecular species with novel structures or unusual reactivity.
Journal ArticleDOI
Effect of Substitution on the Hysteretic Phase Transition in a Bistable Phenalenyl-Based Neutral Radical Molecular Conductor
TL;DR: substitutional doping was applied to [Bu]2 B by crystallizing solid solutions of bistable [Bu]:2 B and its non-radical-containing counterpart [Bu]; the abrupt transformation of the crystal structure to that of the pure [Bu?]2 Be crystal packing was observed, accompanied by a complete collapse of the hysteresis loop.
Journal ArticleDOI
Heisenberg Spin Chains via Chalcogen Bonding: Noncovalent S···O Contacts Enable Long-Range Magnetic Order.
TL;DR: In this article, the self-assembly of Mn(II) metal ions with 1 leads to the formation of [Mn(hfac)2]3(1)2 that exhibits a Mn-II-radical-Mn-II)-radical-mn(2) linear arrangement of three Mn-hfac2 units bridged by two radical ligands.
Journal ArticleDOI
Evaluating the high-pressure structural response and crystal lattice interactions of the magnetically-bistable organic radical TTTA
Jonathan G. Richardson,Asato Mizuno,Yoshiaki Shuku,Kunio Awaga,Neil Robertson,Carole A. Morrison,Mark R. Warren,David R. Allan,Stephen A. Moggach +8 more
TL;DR: In this paper, the structure-pressure response of TTTA has been evaluated by X-ray diffraction, where a lack of a structural phase transition up to 4.6 GPa certifies that the paramagnetic suppression is caused by a steady decrease in the separation between the moieties containing the radical electron along the π-stacking chains.
References
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Journal ArticleDOI
Magneto-Opto-Electronic Bistability in a Phenalenyl-Based Neutral Radical
TL;DR: A new organic molecular conductor, based on a spiro-biphenalenyl neutral radical, simultaneously exhibits bistability in three physical channels: electrical, optical, and magnetic.
Journal ArticleDOI
Room-Temperature Magnetic Bistability in Organic Radical Crystals
TL;DR: A large first-order magnetic phase transition in an organic radical, 1,3,5-trithia-2,4,6-triazapentalenyl, is described and may have applications in thermal sensors, switching units, and information storage media based on organic radical crystals.
Journal ArticleDOI
Bistabilities in 1,3,2-dithiazolyl radicals.
Jaclyn L. Brusso,Owen P. Clements,Robert C. Haddon,Mikhail E. Itkis,Alicea A. Leitch,Richard T. Oakley,Robert W. Reed,John F. Richardson +7 more
TL;DR: A mechanism for the interconversion of the two phases of PDTA and related structures is proposed in which hysteretic behavior arises from cooperative effects associated with the breaking and making of a lattice-wide network of intermolecular S - - -N' and/or S- - -S' interactions.
Journal ArticleDOI
Redox, magnetic, and structural properties of 1,3,2-dithiazolyl radicals. a case study on the ternary heterocycle s3n5c4
a T. M. Barclay,A. W. Cordes,b N. A. George,c R. C. Haddon,c M. E. Itkis,d M. S. Mashuta,b G. W. Patenaude,b R. W. Reed,d and J. F. Richardson +8 more
TL;DR: In this article, the characterization of the heterocyclic radical 1,2,5-thiadiazolo [3,4-b]-1,3,2-dithiazolo[3, 4-b]pyrazin-2-yl (TDP-DTA) is described.
Journal ArticleDOI
Synthesis, crystal structures, electronic structure and magnetic behaviour of the trithiatriazapentalenyl radical, C2S3N3
Gordon D. McManus,Jeremy M. Rawson,Neil Feeder,Joost van Duijn,Eric J. L. McInnes,Juan J. Novoa,Ramón Burriel,Fernando Palacio,Patricia B. Oliete +8 more
TL;DR: In this article, a novel synthesis of the title compound, C2S3N3======677(1) is reported, which is based on DFT calculations and X-ray diffraction in the region 300-225k and reveals a regular π-stacked structure.