Vibronic coupling in excited electronic states of complex molecules

Gastilovich, E. A.

doi:10.1070/pu1991v034n07abeh002448

Cited by 19 publications

(16 citation statements)

References 4 publications

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“…Without allows us to rule out a remarkable coupling of these vibrations through space, for example, by the mechanism of dipole-dipole coupling [111] or via the heavy platinum metal. This behavior is in agreement with observations described for many other compounds [91,106,[111][112][113][114]. However, the situation is different for the low-energy M-L vibrations, which exhibit a clearly observable vibrational coupling, since the movements of the metal are experienced by both ligands.…”

Section: Emission Properties Of [Pt(bpy-ds)2] 2+ and [Pt(bpy-hs)(bpy-supporting

confidence: 80%

“…3.1). Similar conclusions with respect to the spatial extension of electronic states and the occurrence of vibrational satellites in vibronic spectra have been drawn for a long time for many other larger molecules (in particular see [91,240,241] and references therein; cf. also [83,85,104,108] Line-Narrowed Excitation Spectra and [Ru(bpy)3] 2 § Aggregates.…”

Section: Delocalized Situation In [Rumentioning

confidence: 50%

“…Such a behavior is well known for organic molecules (e.g., see [91,[213][214][215]) and other transition metal complexes [38,92,93,101,216]. For example, the related [Os(bpy)3] 2 § doped into the [Ru(bpy)3](PF6) 2 matrix displays this behavior much more distinctly.…”

Section: Vibrational Satellite Structures Of [Ru(bpu 2+mentioning

confidence: 83%

“…(For the theoretical background see e.g. [86][87][88][89][90][91][92][93][94][95][96][97]99]). Equivalent arguments hold also for the second and the third excited state [74].…”

Section: Vibrational Satellite Structures Of [Ru(bpu 2+mentioning

confidence: 99%

“…This shows that the (bpy-ds) ligand is not involved in the process of emission (for further details concerning this conclusion, see Sects. 3.5, 4.2.2; [44,60,85,91,104]). Consequently, in [Pt(bpy-hs)(bpy-ds)] 2+, the lowest excited state (of the specific trap studied) is clearly confined to the protonated ligand.…”

Section: Emission Properties Of [Pt(bpy-ds)2] 2+ and [Pt(bpy-hs)(bpy-mentioning

confidence: 99%

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Characterization of excited electronic and vibronic states of platinum metal compounds with chelate ligands by highly frequency-resolved and time-resolved spectra

Yersin

Humbs

Strasser

Topics in Current Chemistry

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The lowest excited electronic states of triplet character and related vibronic properties are discussed in detail on the basis of highly frequency-resolved and time-resolved emission and excitation spectra of per-protonated, per-deuterated, and partially deuterated [Pt(bpy)2] 2+, [Rh(bpy)3] 3+, [Ru(bpy)3] 2+, and [Os(bpy)3] ~+. Emphasis is placed on the use of the enormous amount of information displayed in well-resolved vibrational satellite structures. For comparison, IR data and Raman spectra are also used. In addition, data are given for [Ru(bpz)Pt(3-thpy) 2, Pt(2-thpy)(CO)(Cl), Pt(2-thpy) 2, Pt(qol)2, Pt(qtl)2. Trends and effects are also addressed, which are related to the amount of metal d-orbital mixing. In particular, we discuss the role of traps and sites in the context of high-resolution, site-selective, and line-narrowed spectra of chromophores doped into matrices; the interplay between states of ligand-centered 3rtrr* and ~MLCT character; localization versus delocalization behavior; radiative decay properties; zero-field splittings; spin-lattice relaxations via direct and Orbach mechanisms; Arrhenius behavior after time delay; Franck-Condon activities and Huang-Rhys factors; Franck-Condon versus Herzberg Teller activities and tunability of these activities under high magnetic fields; isotope marking and deuteration effects; aggregate formation of [Ru(bpy)3]2+; and radiationless energy transfer in neat [Ru(bpy)3](PF6) 2. These effects are in part treated in detail, but the aim is to use easy-to-follow descriptions. In particular, it is emphasized throughout this review that chemical tunability opens fascinating possibilities for controlled variation of physical properties.

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Section: Emission Properties Of [Pt(bpy-ds)2] 2+ and [Pt(bpy-hs)(bpy-supporting

confidence: 80%

Section: Delocalized Situation In [Rumentioning

confidence: 50%

Section: Vibrational Satellite Structures Of [Ru(bpu 2+mentioning

confidence: 83%

“…(For the theoretical background see e.g. [86][87][88][89][90][91][92][93][94][95][96][97]99]). Equivalent arguments hold also for the second and the third excited state [74].…”

Section: Vibrational Satellite Structures Of [Ru(bpu 2+mentioning

confidence: 99%

Section: Emission Properties Of [Pt(bpy-ds)2] 2+ and [Pt(bpy-hs)(bpy-mentioning

confidence: 99%

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Characterization of excited electronic and vibronic states of platinum metal compounds with chelate ligands by highly frequency-resolved and time-resolved spectra

Yersin

Humbs

Strasser

Topics in Current Chemistry

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Transition Metal and Rare Earth Compounds

2000

Topics in Current Chemistry

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The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.Cover design: Friedhelm Steinen-Broo, Barcelona; MEDIO, Berlin Typesetting: Fotosatz-Service K6hler GmbH, 97084 Wiirzburg SPIN: 10719407 02/3020 ra -5 4 3 2 1 0 -Printed on acid-free paper

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