Trinuclear Copper(I) and Silver(I) Adducts of 4-Chloro-3,5-bis(trifluoromethyl)pyrazolate and 4-Bromo-3,5-bis(trifluoromethyl)pyrazolate
| العنوان: | Trinuclear Copper(I) and Silver(I) Adducts of 4-Chloro-3,5-bis(trifluoromethyl)pyrazolate and 4-Bromo-3,5-bis(trifluoromethyl)pyrazolate |
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| المؤلفون: | Daniel Korir, Manal A. Rawashdeh-Omary, Champika V. Hettiarachchi, Muhammed Yousufuddin, Jehan Kohistani, H. V. Rasika Dias |
| المصدر: | Inorganic Chemistry. 52:13576-13583 |
| بيانات النشر: | American Chemical Society (ACS), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Trifluoromethyl, Stereochemistry, Supramolecular chemistry, chemistry.chemical_element, Type (model theory), Copper, Adduct, Inorganic Chemistry, Metal, Crystallography, chemistry.chemical_compound, symbols.namesake, chemistry, visual_art, Stokes shift, Excited state, visual_art.visual_art_medium, symbols, Physical and Theoretical Chemistry |
| الوصف: | Syntheses, structural, and photoluminescence properties of {[4-X-3,5-(CF3)2Pz]M}3 (X = Cl or Br, M = Cu or Ag) containing a heavier halide at the pyrazolyl ring 4-positions are reported. The Cu2O and Ag2O react with [4-Cl-3,5-(CF3)2Pz]H or [4-Br-3,5-(CF3)2Pz]H to form the corresponding metal pyrazolates, which are trinuclear adducts of the type {[4-X-3,5-(CF3)2Pz]M}3 with a nine-membered M3N6 metallacyclic core. They also feature relatively short M···Cl or M···Br intertrimer separations (∼ 3.6 Å) leading to supramolecular aggregates in the solid state. Distinct from the 4-H analogues {[3,5-(CF3)2Pz]M}3, none of the four complexes described herein exhibits short intertrimer metal-metal interactions (as closest such M···M separations are at a distance greater than 5.0 Å). The {[4-X-3,5-(CF3)2Pz]M}3 adducts exhibit bright photoluminescence even at room temperature. The photophysical data suggest that the {[4-X-3,5-(CF3)2Pz]Cu}3 complexes emit from an associative excited state, and the drastic Stokes shift suggests a significant change to the ground state structure of the trinuclear moiety and/or intermolecular interactions upon photoexcitation. The {[4-X-3,5-(CF3)2Pz]Ag}3 complexes emit from a ligand-centered excited state affected by silver and the heavier halogens. Thin films of {[4-X-3,5-(CF3)2Pz]Cu}3 trimers are promising for volatile organic compound (VOC) sensor applications as they exhibit luminescence color change upon exposure to vapors of benzene and its alkylated derivatives. |
| تدمد: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic402080y |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e1ab5325da995c78ae775aa7f8476fe https://doi.org/10.1021/ic402080y |
| رقم الانضمام: | edsair.doi.dedup.....4e1ab5325da995c78ae775aa7f8476fe |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1520510X 00201669 |
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| DOI: | 10.1021/ic402080y |