From chemistry-request@ccl.net Tue Mar 9 20:18:00 2004 Received: from mx1.ustc.edu.cn ([218.22.21.1]) by server.ccl.net (8.12.8/8.12.8) with ESMTP id i2A1Hvjs030733 for ; Tue, 9 Mar 2004 20:17:58 -0500 Received: from dxl ([210.45.66.65]) by mx1.ustc.edu.cn (8.8.7/8.8.6) with ESMTP id JAA26020; Wed, 10 Mar 2004 09:12:26 +0800 Message-Id: <200403100112.JAA26020=at=mx1.ustc.edu.cn> Date: Wed, 10 Mar 2004 9:14:28 +0800 From: "6!Q8@W" Reply-To: dxl=at=mail.ustc.edu.cn To: WEIJUN ZHENG , CCL , "Fan.Huajun=at=epamail.epa.gov" Subject: Re:CCL:vibrational structure in the photoelectronspectrum Organization: VP9z?F4sQ!<|;/Q'J5QiJR X-mailer: Foxmail 4.1 [cn] Mime-Version: 1.0 Content-Type: text/plain; charset="GB2312" X-Spam-Status: No, hits=4.3 required=7.0 tests=HEAD_ILLEGAL_CHARS autolearn=no version=2.61 X-Spam-Level: **** X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on servernd.ccl.net Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by server.ccl.net id i2A1I0js030737 Dear CCLs#: Thank you for your help!!!!!!!!!!!!!!!!! The vibrational temperature of the clusters is estimated to be about room temperature. A UV laser pulse (hv=4.66 eV) is used in the experiment. When the geometry of the neutral molecule are much different > from the anionic molecule, on the assumption that vertical detachment happens, the vibration of the neutral molecule at its equilibrium geometry, I think, will be much different from the experiment data. According to our calculation data, the vibration frequency on PES is between that of the neutral and anionic molecules. !!!!!!!!!!!!!!!!!!!!!!!!!!!!Ding Xunlei !!!!!!!!!!!!!!!!!!!!!!!!!!!!2004-03-10 ______________________________________________ Ding Xunlei, Ph.D. Candidate Open Laboratory of Bond Selective Chemistry University of Science & Technology of China Hefei, Anhui 230026, P.R.China Tel.: 0086-551-3603418 Fax.: 0086-551-3602969 E-mail: dxl=at=mail.ustc.edu.cn Http://www.bsc.ustc.edu.cn/~dxl ======= 2004-03-09 15:14:00 You have written: ======= >Dear Mr. Ding, > >Usually this depends on your experimental condition. >In principle, if you used helium gas expansion to cool your anions >and did it in the right way, the anions should be at ground state. >Therefore, the vibrational structures on the PES should correspond >to the neutral. > >People can observe some vibrational structures of the anions when >the source condition is not cold enough. This is so called hot >band, which shows up at the low electron binding energy side of the >spectrum. Usually, people need some skill in tuning the source >condition to get rid of the hot band. > >The best way to find out whether the vibrational structures are from the >anions or the neutral or both is to look at the change of the spectrum >at difference source conditions. > >Best Wishes, > >Weijun > >*************************************************** >Weijun Zheng >Department of Chemistry >Johns Hopkins University >3400 N. Charles Street >Baltimore, MD 21218 >Homepage: http://jhunix.hcf.jhu.edu/~wz13 >***************************************************** > >----- T-SJ<~ ----- >4S: "6!Q8@W" >HUFZ: PGFZ6~, H}TB 9HU, 2004 IONg0:15 >VwLb: CCL:vibrational structure in the photoelectron spectrum > >> Dear CCL#: >> >> !!!!We can get the vibrational structure in the photoelectron >> spectrum (PES) of an anion molecule . >> I want to know which the vibration is corresponding to, the >> vibration of the anionic or of the >> neutral molecule, or maybe both of them? >> >> Thank you for your help!!!!!!!!!!!!!!!!! >> >> !!!!!!!!!!!!!!!!!!!!!!!!!!!!Ding Xunlei >> !!!!!!!!!!!!!!!!!!!!!!!!!!!!2004-03-09 >> ______________________________________________ >> Ding Xunlei, Ph.D. Candidate >> Open Laboratory of Bond Selective Chemistry >> University of Science & Technology of China >> Hefei, Anhui 230026, P.R.China >> Tel.: 0086-551-3603418 >> Fax.: 0086-551-3602969 >> E-mail: dxl=at=mail.ustc.edu.cn >> Http://www.bsc.ustc.edu.cn/~dxl >> >> >> >> >> >> >> -= This is automatically added to each message by the mailing >> script =- >> To send e-mail to subscribers of CCL put the string CCL: on your >> Subject: line >> and send your message to: CHEMISTRY=at=ccl.net >> >> Send your subscription/unsubscription requests to: CHEMISTRY- >> REQUEST=at=ccl.net >> HOME Page: http://www.ccl.net | Jobs Page: >> http://www.ccl.net/jobs >> >> If your mail is bouncing from CCL.NET domain send it to the >> maintainer:Jan Labanowski, jlabanow=at=nd.edu (read about it on CCL >> Home Page) >> -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- >> +-+-+ >> >> >> >> >> >> > > >. = = = = = = = = = = = = = = = = = = = =