A Screening Approach for the Discovery of Mechanochromic Gold(I) Isocyanide Complexes with Crystal-to-Crystal Phase Transitions.
Mechanoinduced phase transitions of emissive organic crystalline materials have received much attention. Although a variety of such luminescent mechanochromic compounds have been reported, it is challenging to develop mechanochromic compounds with crystal-to-crystal phase transitions in which precis...
| Publicado en: | Journal of the American Chemical Society Vol. 138; no. 19; pp. 6252 - 6261 |
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| Autores principales: | , , |
| Formato: | Artículo |
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American Chemical Society
5/18/2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=115883181&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 115883181 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 5/18/2016 vid: 138 iid: 19 pid: 997 pub: American Chemical Society artinfo: ui: 115883181 10.1021/jacs.6b02409 ppf: 6252 ppct: 9 formats: tig: atl: A Screening Approach for the Discovery of Mechanochromic Gold(I) Isocyanide Complexes with Crystal-to-Crystal Phase Transitions. aug: au: Tomohiro Seki Yuki Takamatsu Hajime Ito affil: Division of Applied Chemistry and Frontier Chemistry Center (FCC), Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan su: Allotropic transition Chromic materials Ultraviolet radiation Emission spectroscopy Diffraction patterns Intermolecular interactions sug: subj: Allotropic transition Chromic materials Ultraviolet radiation Emission spectroscopy Diffraction patterns Intermolecular interactions ab: Mechanoinduced phase transitions of emissive organic crystalline materials have received much attention. Although a variety of such luminescent mechanochromic compounds have been reported, it is challenging to develop mechanochromic compounds with crystal-to-crystal phase transitions in which precise structural information about molecular arrangements can be obtained. Here, we report a screening approach to explore mechanochromic compounds exhibiting a crystal-to-crystal phase transition. We prepared 48 para-substituted (R) phenyl[para-substituted (R) phenyl isocyanide]gold(I) complexes designated R-R (six R and eight R substituents) and then performed three-step screening experiments. The first screening step was selection of emissive complexes under UV light, which gave 37 emissive R-R complexes. The second screening step involved evaluation of the mechanochromic properties by emission spectroscopy. Twenty-eight complexes were found to be mechanochromic. The third screening step involved preparation of single crystals, reprecipitated powders, and ground powders of the 28 mechanochromic R-R complexes. The changes in the powder diffraction patterns of these complexes induced by mechanical stimulation were investigated. Two compounds exhibited a crystal-to-crystal phase transition upon mechanical stimulation, including the previously reported H-H complex. Single crystals of the as-prepared and ground forms of the newly discovered CF-CN complex were obtained. Density functional theory calculations indicated that the mechanoinduced red-shifted emission of CF-CN is caused by formation of aurophilic interactions. Comparison of the crystal structures of CF-CN with those of the other complexes suggests that the weaker intermolecular interactions in the as-prepared form are an important structural factor for the observed mechanoinduced crystal-to-crystal phase transition. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2016 holdings: @attributes: islocal: N |
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