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272943 occurrences (No.93 in the rank) during 5 years in the PubMed. [no cache] 500 found
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272943 occurrences (No.93 in the rank) during 5 years in the PubMed. [no cache] 500 found
| 31) A tunable diode laser was applied as a source of narrowband near-infrared light used to manipulate the structure of the molecule of oxamic acid. |
| PMID:24611466 DOI:10.1021/jp501448m |
| 2015 The journal of physical chemistry. A |
| * Tunable diode lasers as a tool for conformational control: the case of matrix-isolated oxamic acid. |
| - A tunable diode laser was applied as a source of narrowband near-infrared light used to manipulate the structure of the molecule of oxamic acid. Monomers of the most stable conformer I of the molecule, with the trans orientation of the O═COH group and the trans orientation of the O═CC═O fragment, were trapped from the gas phase in low-temperature argon, neon, and nitrogen matrixes. Monomers of oxamic acid, isolated in argon or neon matrixes, were then irradiated with narrowband near-IR light from the diode laser tuned at 6833 (Ar) or 6840 cm(-1) (Ne). Upon such irradiation another conformer, II, of oxamic acid was generated, with cis orientation of the O═COH group and trans orientation of the O═CC═O fragment. Both forms were identified by comparison of their experimental mid-IR spectra with the spectra theoretically calculated for I and II. Subsequent irradiation of the matrix at 6940 (Ar) or 6991 cm(-1) (Ne), where absorption appeared in the near-IR spectrum of the photoproduct, led to photoconversion of conformer II into form I. In a series of subsequent irradiations at 6833(Ar)/6840(Ne) cm(-1) and at 6940(Ar)/6991(Ne) cm(-1), the population of oxamic acid molecules was selectively shifted several times from I to II and vice versa. As far as we know, this is the first reported study where a tunable diode laser source of narrowband near-IR light was used to manipulate the structure of a molecule. Spontaneous II → I transformation was observed for Ne and Ar matrixes kept in the dark and at cryogenic temperature. |
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(39)2 (FA) |
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| (2)15 *null* | (21)3 (AA) |
(40)2 (PA) |
(59)2 hydrolysis |
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(22)3 (ALA) |
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| (4)10 phenethyl |
(23)3 (GABA) |
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| (5)10 phosphatase |
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(62)2 nanoparticles |
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(44)2 (SLA) |
(63)2 peptide |
| (7)8 was |
(26)3 decarboxylase |
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| (8)6 (HA) |
(27)3 etching |
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(29)3 metabolism |
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