Photodissociation Electronic Spectra of Cold Protonated Quinoline and Isoquinoline in the Gas Phase
作者:Géraldine Féraud、Luis Domenianni、Ernesto Marceca、Claude Dedonder-Lardeux、Christophe Jouvet
DOI:10.1021/acs.jpca.7b01301
日期:2017.4.6
← S0 transitions exhibit clear 0–0 bands at hν0–0 = 27868 and 42230 cm–1, for protonated quinoline, and at hν0–0 = 28043 and 41988 cm–1, for protonated isoquinoline. Active vibrations in the spectra were assigned with the help of calculated normal modes, looking very similar to those of the structurally related protonated naphthalene. Finally, we have observed that the bandwidths associated with the
分离的单异构N质子化喹啉(quinolinium)和异喹啉(isoquinolinium)离子的分光电子光谱已在约40 K的温度下使用质量选择10 cm –1进行了测量。光谱分辨率,光解离光谱仪。此外,使用RI-ADC(2)方法计算的从头开始的绝热过渡能已用于协助光谱的分配。紫外和深紫外光谱范围内的质子化离子都清楚地证明了具有ππ*特征的三个电子跃迁。Hansen等人先前已报道了室温下的相应光谱,以及TD-DFT计算和可能的碎裂机理的仔细分析。在本研究中,此信息将通过附加更好的分辨光谱(冷离子的特征)得到补充,在该光谱中,与S 1 ←S 0和S 3 ←S 0相关的明确的振动级数跃迁在表现出明显的条带0-0 ħ ν 0-0 = 27868和42230厘米-1,对于质子化喹啉,并在ħ ν 0-0 = 28043和41988厘米-1,对于质子化异喹啉。光谱中的主动振动借助计算的法向模进行分配,看