http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Filming the Birth of Molecules and Accompanying Solvent Rearrangement
Lee, Jae Hyuk,Wulff, Michael,Bratos, Savo,Petersen, Jakob,Guerin, Laurent,Leicknam, Jean-Claude,Cammarata, Marco,Kong, Qingyu,Kim, Jeongho,Møller, Klaus B.,Ihee, Hyotcherl American Chemical Society 2013 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.135 No.8
<P>Molecules are often born with high energy and large-amplitude vibrations. In solution, a newly formed molecule cools down by transferring energy to the surrounding solvent molecules. The progression of the molecular and solute–solvent cage structure during this fundamental process has been elusive, and spectroscopic data generally do not provide such structural information. Here, we use picosecond X-ray liquidography (solution scattering) to visualize time-dependent structural changes associated with the vibrational relaxation of I<SUB>2</SUB> molecules in two different solvents, CCl<SUB>4</SUB> and cyclohexane. The birth and vibrational relaxation of I<SUB>2</SUB> molecules and the associated rearrangement of solvent molecules are mapped out in the form of a temporally varying interatomic distance distribution. The I–I distance increases up to ∼4 Å and returns to the equilibrium distance (2.67 Å) in the ground state, and the first solvation cage expands by ∼1.5 Å along the I–I axis and then shrinks back accompanying the structural change of the I<SUB>2</SUB> molecule.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2013/jacsat.2013.135.issue-8/ja312513w/production/images/medium/ja-2012-12513w_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja312513w'>ACS Electronic Supporting Info</A></P>