CAJ | 학술논문

将金刚石对顶砧高压技术与飞秒时间分辨光谱测量技术结合起来,研究了压力对染料LDS698受激分子超快能量弛豫过程的影响.实验结果表明,当压力超过3.0 GPa时,样品溶液发生固化,在不同的样品状态下,压力对受激分子能量弛豫过程的影响不同.当压力低于3.0 GPa时,压力对分子内和分子间的能量弛豫过程均有显著的影响;当压力高于3.0GPa时,分子内的能量弛豫过程受压力的影响可以忽略不计,而分子间的能量弛豫过程随压力的变化仍然比较显著.利用相应的理论模型,对实验结果进行解释,由此证明压力能够影响分子的能带结构、分子间的相互作用以及分子跟周围溶液的热传导过程.
장금강석대정침고압기술여비초시간분변광보측량기술결합기래,연구료압력대염료LDS698수격분자초쾌능량이예과정적영향.실험결과표명,당압력초과3.0 GPa시,양품용액발생고화,재불동적양품상태하,압력대수격분자능량이예과정적영향불동.당압력저우3.0 GPa시,압력대분자내화분자간적능량이예과정균유현저적영향;당압력고우3.0GPa시,분자내적능량이예과정수압력적영향가이홀략불계,이분자간적능량이예과정수압력적변화잉연비교현저.이용상응적이론모형,대실험결과진행해석,유차증명압력능구영향분자적능대결구、분자간적상호작용이급분자근주위용액적열전도과정.
The ultrafast molecular energy relaxation dynamic processes of LDS698 molecules at high pressure were studied by using the technique combined femtosecond time-resolved spectral measurement with high pressure generation.The results indicated that the LDS698 solution solidified at about 3.0 GPa.The pressure effects on the energy relaxation of the excited molecules are different.When the pressure is lower than 3.0 GPa,the pressure effects on the intra-and inter-molecular energy relaxation are all significant;and when the pressure is higher than 3.0 GPa,the pressure effect on the intra-molecular energy relaxation can be neglected,but the effect on the intermolecular relaxation is also significant.Using the theories suggested the pressure effects on the ultrafast energy relaxation are satisfactorily interpreted.The results also indicated that pressure could influence on the molecular energy gaps,the intermolecular interaction,and the solution thermal conduction.