A forgotten channel in the excited state dynamics of phenol-(ammonia)n clusters:: hydrogen transfer

被引：103

作者：

Pino, G ^{[1
]}

Grégoire, G ^{[1
]}

Dedonder-Lardeux, C ^{[1
]}

Jouvet, C ^{[1
]}

Martrenchard, S ^{[1
]}

Solgadi, D ^{[1
]}

机构：

[1] Univ Paris Sud, CNRS, Photophys Mol Lab, F-91405 Orsay, France

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2000年 / 2卷 / 04期

关键词：

D O I：

10.1039/a908497e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Small phenol-(NH3)(n) clusters have been studied through two-color two-photon and one-photon VUV ionization, in order to disentangle the contributions of various dissociation or reaction paths in the excited and ionic states. The most striking result of the two-color experiment is that (NH4)(+)(NH3)(n=1,5) fragments are observed with large delays (up to a few hundred nanoseconds) between the excitation and ionization lasers, whereas these same fragments are not observed in the VUV one-photon ionization experiment. In order to account for these findings, a new deactivation channel in the excited state of phenol-(NH3)(n) clusters has to be introduced: the hydrogen atom transfer PhOH(S-1) - (NH3)(n)--> PhO. + (NH4)(NH3)(n-1). In this case, the delayed (NH4)(+)(NH3)(n-1) signals correspond to direct ionization of the (NH4)(NH3)(n-1) clusters produced in the excited state.

引用

页码：893 / 900

页数：8

共 58 条

[11] PHOTO-IONIZATION MEASUREMENT OF THE TRIPLET LIFETIME OF BENZENE [J].

DUNCAN, MA ;

DIETZ, TG ;

LIVERMAN, MG ;

SMALLEY, RE .

JOURNAL OF PHYSICAL CHEMISTRY, 1981, 85 (01) :7-9

[12] STRUCTURES, STABILITIES, AND INTERMOLECULAR VIBRATIONAL FREQUENCIES OF SMALL AMMONIA COMPLEXES BY MOLECULAR MECHANICS FOR CLUSTERS ANALYSIS [J].

DYKSTRA, CE ;

ANDREWS, L .

JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (10) :6043-6048

[13] EFFECTS ON THE ACIDITIES OF PHENOLS FROM SPECIFIC SUBSTITUENT-SOLVENT INTERACTIONS - INHERENT SUBSTITUENT PARAMETERS FROM GAS-PHASE ACIDITIES [J].

FUJIO, M ;

MCIVER, RT ;

TAFT, RW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1981, 103 (14) :4017-4029

[14] Ultrafast photochemistry of ammonia clusters: Formation and decay of hypervalent molecular clusters containing the NH4 radical [J].

Fuke, K ;

Takasu, R .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1995, 68 (12) :3309-3318

[15] PHOTOIONIZATION OF HYPERVALENT MOLECULAR CLUSTERS - ELECTRONIC-STRUCTURE AND STABILITY OF NH4(NH3)N [J].

FUKE, K ;

TAKASU, R ;

MISAIZU, F .

CHEMICAL PHYSICS LETTERS, 1994, 229 (06) :597-603

[16] AN EXPERIMENTAL-STUDY OF HYPERVALENT MOLECULAR CLUSTERS BY NEUTRALIZED ION-BEAM SPECTROSCOPY - NH4(NH3)1,NH4(NH3)2,NH4(NH3)3 AND ND4(ND3)1,ND4(ND3)2,ND4(ND3)3 [J].

GELLENE, GI ;

PORTER, RF .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (26) :6680-6684

[17] STABILITY OF THE AMMONIUM AND METHYLAMMONIUM RADICALS FROM NEUTRALIZED ION-BEAM SPECTROSCOPY [J].

GELLENE, GI ;

CLEARY, DA ;

PORTER, RF .

JOURNAL OF CHEMICAL PHYSICS, 1982, 77 (07) :3471-3477

[18] 2-COLOR PHOTOIONIZATION OF VANDERWAALS COMPLEXES OF FLUOROBENZENE AND HYDROGEN-BONDED COMPLEXES OF PHENOL IN SUPERSONIC JETS [J].

GONOHE, N ;

ABE, H ;

MIKAMI, N ;

ITO, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (17) :3642-3648

[19] ULTRAVIOLET PHOTOELECTRON-SPECTROSCOPY OF THE PHENIDE, BENZYL AND PHENOXIDE ANIONS, WITH ABINITIO CALCULATIONS [J].

GUNION, RF ;

GILLES, MK ;

POLAK, ML ;

LINEBERGER, WC .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, 1992, 117 (1-3) :601-620

[20] IR EXCITATION AND DISSOCIATION OF (NH3)2, (NH3)3, (NH3)4, (NH3)5 AND ARNH3 [J].

HEIJMEN, B ;

BIZZARRI, A ;

STOLTE, S ;

REUSS, J .

CHEMICAL PHYSICS, 1988, 126 (01) :201-211

← 1 2 3 4 5 6 →