Ultraviolet and Infrared Spectra of Diboron in Solid Neon at 4 K.
Apart from products H, B, BH, BH2and BH3identified 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 A3Σu-←X3Σg-of B2at 326.39 nm. Absorption lines (1,0) of11B2,11B10B and10B2were recorded at 316.63, 316.40 and 316.15 nm, respectively. ΔG1/2of state A3Σu-for11B2,11B10B and10B2in solid neon are accordingly derived to be 945, 968 and 993 cm-1, respectively. Weak lines (0,1) of11B2at 29586 cm-1and of11B10B at 29560 cm-1, corresponding to 1042±30 and 1068±30 cm-1for vibrational modes in the electronic ground state, were recorded in emission. An absorption line recorded at 1066.5±0.5 cm-1in infrared spectra after photolysis of either B2H6in Ne or B2D6with D2in Ne is thus attributed to11B10B.
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Jen-Iu
JI
Lo
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Sheng-Lung
SL
Chou
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Hsiao-Chi
HC
Lu
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Yu-Chain
YC
Peng
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Meng-Yeh
MY
Lin
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan.
Bing-Ming
http://orcid.org/0000-0002-8540-6274
BM
Cheng
Escuela de Quimica, Universidad de Costa Rica, Ciudad Universitaria Rodrigo Facio, San Pedro de Montes de Oca, San Jose, 11501-2060, Costa Rica.
J F
JF
Ogilvie
IR spectroscopy; UV/Vis spectroscopy; diborane(6); diboron; far-ultraviolet photolysis