Optical and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole and isocyanide, ethylenediamine, and diethyldithiocarbamate ligands

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Optical and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole and isocyanide, ethylenediamine, and diethyldithiocarbamate ligands. / Katlenok, E. A.; Kinzhalov, M. A.; Eremina, A. A.; Balashev, K. P.

в: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Том 122, № 5, 05.2017, стр. 723-728.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{0e75864ac54a4ad7b07ace114b3700c6,

title = "Optical and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole and isocyanide, ethylenediamine, and diethyldithiocarbamate ligands",

abstract = "The influence of donor-acceptor properties of tert-butyl-, 2.6-dimethylphenyl-, and 4-bromophenyl-isocyanides (BuNC, XylNC, BpNC), ethylenediamine (En), and diethyldithiocarbamate ions (Dtc-) on the H-1 and C-13 NMR, IR, optical, and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole is studied. Enhancement of the donor properties of BpNC, XylNC, BuNC, En, and Dtc(-) ligands leads to a bathochromic shift of metal-to-ligand charge transfer (MLCT) bands and to a decrease in the difference between the one-electron oxidation and reduction potentials of complexes. The bathochromic shift of the low-temperature phosphorescence of complexes in frozen (77 K) solutions with increasing donor properties of BpNC, XylNC, BuNC, En, and Dtc-ligands is caused by a decrease in the admixture of MLCT to the intraligand excited state of {Ir(bptz)(2)}. Quenching of the phosphorescence of complexes in liquid solutions is attributed to the thermally-induced population of excited d-d* states with subsequent nonradiative deactivation.",

keywords = "LIGHT-EMITTING DEVICES, IRIDIUM COMPLEXES, EXCITED-STATES, PHOSPHORESCENT, RHODIUM(III)",

author = "Katlenok, {E. A.} and Kinzhalov, {M. A.} and Eremina, {A. A.} and Balashev, {K. P.}",

year = "2017",

month = may,

doi = "10.1134/S0030400X17050113",

language = "Английский",

volume = "122",

pages = "723--728",

journal = "OPTICS AND SPECTROSCOPY",

issn = "0030-400X",

publisher = "Pleiades Publishing",

number = "5",

}

RIS

TY - JOUR

T1 - Optical and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole and isocyanide, ethylenediamine, and diethyldithiocarbamate ligands

AU - Katlenok, E. A.

AU - Kinzhalov, M. A.

AU - Eremina, A. A.

AU - Balashev, K. P.

PY - 2017/5

Y1 - 2017/5

N2 - The influence of donor-acceptor properties of tert-butyl-, 2.6-dimethylphenyl-, and 4-bromophenyl-isocyanides (BuNC, XylNC, BpNC), ethylenediamine (En), and diethyldithiocarbamate ions (Dtc-) on the H-1 and C-13 NMR, IR, optical, and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole is studied. Enhancement of the donor properties of BpNC, XylNC, BuNC, En, and Dtc(-) ligands leads to a bathochromic shift of metal-to-ligand charge transfer (MLCT) bands and to a decrease in the difference between the one-electron oxidation and reduction potentials of complexes. The bathochromic shift of the low-temperature phosphorescence of complexes in frozen (77 K) solutions with increasing donor properties of BpNC, XylNC, BuNC, En, and Dtc-ligands is caused by a decrease in the admixture of MLCT to the intraligand excited state of {Ir(bptz)(2)}. Quenching of the phosphorescence of complexes in liquid solutions is attributed to the thermally-induced population of excited d-d* states with subsequent nonradiative deactivation.

AB - The influence of donor-acceptor properties of tert-butyl-, 2.6-dimethylphenyl-, and 4-bromophenyl-isocyanides (BuNC, XylNC, BpNC), ethylenediamine (En), and diethyldithiocarbamate ions (Dtc-) on the H-1 and C-13 NMR, IR, optical, and electrochemical characteristics of Ir(III) complexes with metalated 4-(4-bromophenyl)-2-methyl-1,3-thiazole is studied. Enhancement of the donor properties of BpNC, XylNC, BuNC, En, and Dtc(-) ligands leads to a bathochromic shift of metal-to-ligand charge transfer (MLCT) bands and to a decrease in the difference between the one-electron oxidation and reduction potentials of complexes. The bathochromic shift of the low-temperature phosphorescence of complexes in frozen (77 K) solutions with increasing donor properties of BpNC, XylNC, BuNC, En, and Dtc-ligands is caused by a decrease in the admixture of MLCT to the intraligand excited state of {Ir(bptz)(2)}. Quenching of the phosphorescence of complexes in liquid solutions is attributed to the thermally-induced population of excited d-d* states with subsequent nonradiative deactivation.

KW - LIGHT-EMITTING DEVICES

KW - IRIDIUM COMPLEXES

KW - EXCITED-STATES

KW - PHOSPHORESCENT

KW - RHODIUM(III)

U2 - 10.1134/S0030400X17050113

DO - 10.1134/S0030400X17050113

M3 - статья

VL - 122

SP - 723

EP - 728

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 5

ER -

ID: 28180441