完整後設資料紀錄
DC 欄位語言
dc.contributor.authorChang, Chun-Fuen_US
dc.contributor.authorWang, Szu-Chengen_US
dc.contributor.authorShigeto, Shinsukeen_US
dc.date.accessioned2014-12-08T15:35:03Z-
dc.date.available2014-12-08T15:35:03Z-
dc.date.issued2014-02-06en_US
dc.identifier.issn1932-7447en_US
dc.identifier.urihttp://dx.doi.org/10.1021/jp410941ten_US
dc.identifier.urihttp://hdl.handle.net/11536/23795-
dc.description.abstractExtremely low-frequency (LF) Raman spectroscopy that allows for fast access to lattice vibrations with little hindrance of immense Rayleigh scattering was used to track in situ thermally induced polymorphic transformation of crystalline 1,1'-binaphthyl (BN), a fundamental structural unit of specific chiral ligands. BN occurs in two conformational polymorphs, cisoid and transoid forms, with the former being a racemate and the latter being a conglomerate of chiral crystals. Observed LF Raman spectra (from 200 cm(-1) down to similar to 5 cm(-1), equivalent to 0.15 THz), which arise predominantly from lattice vibrations, show markedly different features between the cisoid and transoid forms, making it possible to study their phase transition. A series of LF Raman spectra measured with slow heating of microcrystalline BN reveal that, in contrast to previous studies, the monoclinic cisoid form transforms directly to the tetragonal transoid form in the solid state without formation of any intermediate phase. The present approach is applicable to various phase transition systems, including pharmaceutical compounds, liquid crystals, and polymer films, which conventional X-ray diffraction analysis may not be able to investigate.en_US
dc.language.isoen_USen_US
dc.titleIn Situ Ultralow-Frequency Raman Tracking of the Polymorphic Transformation of Crystalline 1,1 '-Binaphthylen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/jp410941ten_US
dc.identifier.journalJOURNAL OF PHYSICAL CHEMISTRY Cen_US
dc.citation.volume118en_US
dc.citation.issue5en_US
dc.citation.spage2702en_US
dc.citation.epage2709en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000331153700053-
dc.citation.woscount1-
顯示於類別:期刊論文


文件中的檔案:

  1. 000331153700053.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。