Investigations of relative intensity, line width and depolarizatioli ratio of atactic polystyrene have been perfornicd for the Ranian lines 622 cm-1 (bending) and 1002 cm-1 (stretching). The nieasurements were performed with solutions in carbon tetrachloride and chloroform of different concentrations. The concentration effect obscrved is interpreted in terms of amplitude changes and vibrational correlation time of the investigated vibrational modes with simultaneous change of the chain conformation. Unlcrsurhungen zur Konzentrationsabhangigkeit der intraniolekularen Beweglichkeit von Polystyren in Kohlenstofftetrachlorid und Chloroforna und deren Sinflu/? auf die Schwingungen der PhenylgruppeDie relative Intensitit, Linienbreite und Depolarisation der Ramanlinien 622 cm-' und 1002 cm-' von atalitischem Polystyren wurden gcmessen. Die Untersuchungen erfolgten in Kohlenstofftetrachloridund Chloroformlosungen bci uiilcrschiedlicl~e~i Iionzentrationcn. Die IConzentrationsabhangigkeit der gemessenen Parameter wird im Zusaminenhang mit h i d c r~~r g e n dcr Amplitude und der Korrelationszeiten des Vibralionsanteils der betrachteten Scliwingungen sowie der Anderui:gen der I(ettenhotifor1nation erklart. Ilccnedooanu~ zonyenmpayuonnoii ~~~U C U M O C~U snympu~noaelFyJc~pno~i nodsuwnocnau nonucmupoaao uembcpex-xcnopucmoM yznepoae u xngp,pofi>ppwe u es enumue na ~o n e 6 a n u~ &enuabn3iL zpynnu I/laMepeHbI OTHOCMTeJIbHaR MHTeHCHBHOCTb, IIIMpHHa H RenOJIRpH3aqHR JIMHHfi CneKTpOB KOM6MHaqHOHHOrO paCCe-RHHR 622 CM-' H 1002 CM-l aTaKTHqeCKOI'0 IIOJIMCTHpOJIa. kICCJIeH0BaHHR npOBOAHJIMCb B PaCTBOpaX IIOJlUCTMpOJla B 4eTbIpeXXJIOpMCTOM YI'JIepOAe H XJlOpO$OpMe "pH PaaJIHqHbIX KOH4eHTpaUHHX. KOHqeHTpaqHOHHaR 3aBMCHMOCTb H3MepeHHblX IIapaMeTpOB O~% S I~H R~T C R B CBFIaH C 113MeHeHHRMH aMIIJIHTyAbl M BpeMeH KOppeJIRqMH BHbpaqHOHHOii AOJIH PaCCMaTpABaeMbIX KOXe6aHMfi, a TPKXW C H3MC'lIeHIiRMH KOH@OPMaqMH IJC'nH.
Conformational changes of polystyrene macromolecules with concentration in CHCl, observed by measurement of the depolarization ratio of Raman lines, and their absence in CCl, are essential when considering the dependence of the radius of gyration of the macromolecules on the concentration. The problem was dealt with basing on theoretical calculations of the dependence of the extension ratio of a macromolecule on the concentration in CCl, and CHCl,, with the critical concentration values being determined simultaneously. The effect of hindered inner mobility of the chains arising from the enhanced intermolecular interactions was taken into account. Volumen-Konzentrations-Effekt von Polystyren in Kohlenstofftetrachlorid-und ChloroformliisungenDie Antierung der Konformation von Polystyrenmolekulen mit der Konzentration in CHCl,, die durch Messung der Depolarisation von Ramanlinien festgestellt wurde, sowie das Fehlen solcher Anderungen in CCl, sind von Interesse, weiin die Abhangigkeit des Gyrationsradius der Makromolekule von der Konzentration untersucht wird. Das Problem wurde auf der Basis tbeoretischer Berechnungen der Konzentrationsabhangigkeit des Grohnverhaltnisses der Makromolekule in CCl, und CHCl, und gleichzeitiger Messung der kritischen Konzentration behandelt. Der EinfluB der behinderten inneren Beweglichkcit der Ketten infolge starkerer intermolekularer Wechselwirkungen wurde berucksichtigt. ~67~ewno-eron~enrnpay~onnbte sijlj$ieermba e pacmsopax nonucmupoAa e qemMpexxnopucmow yenepode u xaopofiopae ~OHqeHTPaqHOHHbIe H3MeHeHHFI KOHC$OpMaqHH MaKPOMOJIeKyJI IIOnHCTHpOJIa B CHC&, yCTaHOBJIeHHbIe M3MepeHHeM AenOJlfIpH3aqHH JIHHHa CIIeKTpOB KOM6HHaqHOHHOl'O PaCCeFlHHH, a TaKXe OTCYTCTBHe TaKHX H3MeHeHHfi B CCI, npeACTaBJlHIOT HHTepeC B TOM CJIyqae, K O r A a MCCJIeAJ'eTCH 3aBHCHMOCTb paAMyCa MHepqHH MaKpOMOJIeKyJl OT KOHqeHTpaqHH. npO6JIeMa PaCCMaTpMBaJIaCb H a OCHOBe TeOpeTH9eCKWX PaCqeTOB KOHqeHTPaqHOHHOa 3aBMCHMOCTH COOTHOllIeHHH pa3MepOB MaKpOMOJIeKyJI B CCI, H CHCl, H ORHOBpeMeHHOrO H3MepeHHfl KPHTHqeCKOfi KOHqeHTpaqHM. YqHTbIBaJTOCb BJIHflHHe 3aTOpMO?KeHHO# BHYTPeHHefi IIOABHHcHOCTU qenea, 06yCJIOBJEHHO8 6onee CMJIbHbIMH MeXMO-JleKYJlRPHbIMH B3aHMOHe&CTBMHMH.
Absorption spectra in the far and intermediate infrared, as well as Raman and vibronic spectra were measured for three crystalline forms of four-ligand europium chelate with dibenzoylmethane and piperidine and a three-ligand chelate in the spectral ranges: 40-450, 450-4500, 0-4500 and 0-1600 cm - 1 , respectively. The analysis of the individual spectra enabled the identification of the frequencies corresponding to the vibrations of the Eu -O bond coupled with the lattice vibrations, and the frequencies of the intraligand vibrations. It is found that piperidine is bound to the complex molecule by hydrogen bond.
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