Orientation Of Guest Research Articles

Zero-field Splitting Tensor and Orientation of the Phosphorescent-state Benzo[h]quinoline in Biphenyl Host

Abstract ESR absorption has been observed in a single-crystal solid solution of benzo[h]quinoline in biphenyl under UV irradiation at 120 K. The triplet-state zerofield splitting tensor and the guest orientation are reported, in comparison with the previous results on benzo[f]quinoline.

Electron paramagnetic resonance studies of the lowest triplet states of 1,2-benzanthracene- d12, chrysene- d12, and 1,2;5,6-dibenzanthracene- d14 in single-crystal p-terphenyl in the range from 4 to 240 K, and their implications concerning phase transitions in p-terphenyl below 240 K

Low-field electron paramagnetic resonance studies from 65 to 240 K of the zero-field splittings of triplet 1,2-benzanthracene- d 12 dilutely substituted in single-crystal p-terphenyl have yielded 193.0 ± 0.3 K as the best value of the temperature at which a phase transition sets in upon cooling, and at which it is completed upon warming, these crystals. Similar studies of triplet chrysene- d 12 (from 7.7 to 80 K) and of 1,2;5,6-dibenzanthracene- d 14 (from 7.4 to 100.7 K) dilutely substituted in single-crystal p-terphenyl give evidence of a previously unreported second phase transition intrinsic to p-terphenyl, but influenced measurably by the presence of dilute guests. In chrysene substituted p-terphenyl, the system for which our present data most clearly indicate a second phase transition, the transition temperature lies in the range from 7.9 to 8.2 K. Our results for these phase transitions are discussed in the context of recent experimental and theoretical results for crystalline p-terphenyl below room temperature. Multiple orientation of these triplet guests and their interactions with p-terphenyl host are discussed for all three systems, and several notable features of the spectra are described.

ChemInform Abstract: FLUORESCENCE AND ABSORPTION SPECTRA OF ANTHRACENE CRYSTALS AT 4 K DOPED WITH 1‐ AND 2‐AMINOANTHRACENE, EFFECTS OF GUEST ORIENTATION

Chemischer InformationsdienstVolume 5, Issue 9 Physical Organic Chemistry ChemInform Abstract: FLUORESCENCE AND ABSORPTION SPECTRA OF ANTHRACENE CRYSTALS AT 4 K DOPED WITH 1- AND 2-AMINOANTHRACENE, EFFECTS OF GUEST ORIENTATION N. JAMES BRIDGE, N. JAMES BRIDGESearch for more papers by this authorDAVID VINCENT, DAVID VINCENTSearch for more papers by this author N. JAMES BRIDGE, N. JAMES BRIDGESearch for more papers by this authorDAVID VINCENT, DAVID VINCENTSearch for more papers by this author First published: March 5, 1974 https://doi.org/10.1002/chin.197409062AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume5, Issue9March 5, 1974 RelatedInformation

Fluorescence and absorption spectra of anthracene crystals at 4 K doped with 1- and 2-aminoanthracene: effects of guest orientation

Download options Please wait... Article information DOI https://doi.org/10.1039/F29747000030 Article type Paper Download Citation J. Chem. Soc., Faraday Trans. 2, 1974,70, 30-36 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS Permissions Request permissions Fluorescence and absorption spectra of anthracene crystals at 4 K doped with 1- and 2-aminoanthracene: effects of guest orientation N. J. Bridge and D. Vincent, J. Chem. Soc., Faraday Trans. 2, 1974, 70, 30 DOI: 10.1039/F29747000030 To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page. If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given. If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page. Read more about how to correctly acknowledge RSC content. Search articles by author N. James Bridge David Vincent

X-Ray crystallographic investigation of guest orientation and conformation in a clathrate inclusion compound

An X-ray crystal structure analysis has unambiguously established the orientation and conformation of the guest molecule 2,5,5-trimethylhex-3-yn-2-ol (II) in the cage of the clathrate host 4-p-hydroxyphenyl-2,2,4-trimethylthiochroman (I).