Ultraviolet and Infrared Spectra of Diboron in Solid Neon at 4 K

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• 作者：Dr. Jen-Iu Lo ; Sheng-Lung Chou ; Dr. Hsiao-Chi Lu ; Yu-Chain Peng ; Meng-Yeh Lin ; Dr. Bing-Ming Cheng and Prof. J. F. Ogilvie
• 刊名：ChemPhysChem
• 出版年：2017
• 出版时间：January 4, 2017
• 年：2017
• 卷：18
• 期：1
• 页码：124-127
• 全文大小：674K
• ISSN：1439-7641

文摘

Apart from products H, B, BH, BH₂ and BH₃ identified from their emission spectra in the UV/Vis region, photolysis of diborane(6) dispersed in solid neon at 4 K with far-ultraviolet light from a synchrotron led to observation of absorption line (0,0) of the electronic transition A ³Σ_u⁻←X ³Σ_g⁻ of B₂ at 326.39 nm. Absorption lines (1,0) of ¹¹B₂, ¹¹B¹⁰B and ¹⁰B₂ were recorded at 316.63, 316.40 and 316.15 nm, respectively. ΔG_1/2 of state A ³Σ_u⁻ for ¹¹B₂, ¹¹B¹⁰B and ¹⁰B₂ in solid neon are accordingly derived to be 945, 968 and 993 cm⁻¹, respectively. Weak lines (0,1) of ¹¹B₂ at 29586 cm⁻¹ and of ¹¹B¹⁰B at 29560 cm⁻¹, corresponding to 1042±30 and 1068±30 cm⁻¹ for vibrational modes in the electronic ground state, were recorded in emission. An absorption line recorded at 1066.5±0.5 cm⁻¹ in infrared spectra after photolysis of either B₂H₆ in Ne or B₂D₆ with D₂ in Ne is thus attributed to ¹¹B¹⁰B.