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201.
Komiya N Muraoka T Iida M Miyanaga M Takahashi K Naota T 《Journal of the American Chemical Society》2011,133(40):16054-16061
Instant and precise control of phosphorescent emission can be performed by ultrasound-induced gelation of organic liquids with chiral, clothespin-shaped trans-bis(salicylaldiminato)Pt(II) complexes, anti-1. Nonemissive solutions of racemic, short-linked anti-1a (n = 5) and optically pure, long-linked anti-1c (n = 7) in organic liquids are transformed immediately into stable phosphorescent gels upon brief irradiation of low-power ultrasound. Emission from the gels can be controlled by sonication time, linker length, and optical activity of the complexes. Several experimental results indicated that structure-dependent homo- and heterochiral aggregations and ultrasound-control of the aggregate morphology are key factors for emission enhancement. 相似文献
202.
Infrared spectrum of the cobalt carbonyl radical CoCO produced by the 193 nm excimer laser photolysis of cobalt tricarbonyl nitrosyl Co(CO)3NO was observed by time-resolved diode laser spectroscopy. More than 600 lines were identified as belonging to the ν1 (C-O stretch) fundamental band, consisting of the Ω=5/2 and 3/2 subbands, and the associated hot bands , , , and . The 2Δi electronic ground state of CoCO was experimentally confirmed. The ν1 band origins are 1974.172582(93) cm−1 and 1973.53178(14) cm−1 for the Ω=5/2 and 3/2 subbands, respectively. The rotational constant in the ground state was determined as B0=4427.146(50) MHz. The centrifugal distortion constant D0=1.1243(68) kHz was obtained for the Ω=5/2 substate of the ground state. The equilibrium rotational constant Be=4435.44(14) MHz was derived, together with the vibration-rotation interaction constants. 相似文献
203.
A Bi(2)O(3)-based erbium-doped fiber (BIEDF) ring laser with a 134 nm tunable range is demonstrated with only 0.2 m of BIEDF as a gain media. The widely tunable range corresponds to the broad amplified spontaneous emission spectrum obtained from BIEDF. The pump power dependence and BIEDF length dependence of fiber laser properties are investigated. The tunable range varies depending on both pump power and BIEDF lengths. A high optical signal-to-noise ratio of over 70 dB for a 120 nm tunable range is also shown. 相似文献
204.