本文選題：羰基配合物 + 催化�。� 參考：《光譜學(xué)與光譜分析》2016年S1期

【摘要】：研究了五羰基溴化錸[Re(CO)5Br]的超快振動(dòng)動(dòng)力學(xué)。由于分子對(duì)稱性,一維紅外光譜中只表現(xiàn)出兩個(gè)羰基吸收峰,分別位于1 984.7cm-1(A1)和2 037.6cm-1(E)。由泵浦探測(cè)光譜獲得了各模式的0→1(基態(tài)漂白)和1→2(激發(fā)態(tài)吸收)的躍遷信號(hào),從而得到了振動(dòng)態(tài)壽命。在時(shí)間分辨的二維紅外光譜中,每一對(duì)角峰取向隨等待時(shí)間發(fā)生了變化,表明都發(fā)生了光譜擴(kuò)散,從中可提取各個(gè)振動(dòng)模式的頻率-時(shí)間相關(guān)函數(shù)。此外,我們發(fā)現(xiàn)二維紅外光譜的非對(duì)角峰隨時(shí)間發(fā)生強(qiáng)度變化,表明兩個(gè)模式間有振動(dòng)傳能。
[Abstract]:The ultrafast vibration kinetics of rhenium pentacarbonyl bromide [re (CO) 5Br] has been studied. Due to molecular symmetry, there are only two carbonyl absorption peaks in one-dimensional infrared spectroscopy, which are located at 1 984.7cm-1 (A1) and 2 037.6cm-1 (E), respectively. The transition signals of 0 ~ 1 (ground state bleaching) and 1 ~ (2) (excited state absorption) of different modes are obtained from the pump detection spectra, thus the vibrational dynamic lifetime is obtained. In the time-resolved two-dimensional infrared spectroscopy, the orientation of each pair of angular peaks varies with the waiting time, indicating that spectral diffusion occurs, from which the frequency-time correlation functions of each vibration mode can be extracted. In addition, we find that the intensity of the non-diagonal peaks of the two-dimensional infrared spectra varies with time, indicating that there is vibration energy transfer between the two modes.
【作者單位】： 北京分子科學(xué)國(guó)家實(shí)驗(yàn)室;中國(guó)科學(xué)院化學(xué)研究所分子反應(yīng)動(dòng)力學(xué)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(21473212,21327602,21573243)資助
【分類號(hào)】：O641.4;O657.33
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本文編號(hào)：2083462