Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Luminescence of the Mn2+ ion in non-O h and T d coordination environments: The missing case of square pyramid. / Artemev, Alexander V.; Davydova, Maria P.; Berezin, Alexey S. и др.
в: Dalton Transactions, Том 48, № 43, 21.11.2019, стр. 16448-16456.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Luminescence of the Mn2+ ion in non-O h and T d coordination environments: The missing case of square pyramid
AU - Artemev, Alexander V.
AU - Davydova, Maria P.
AU - Berezin, Alexey S.
AU - Brel, Valery K.
AU - Morgalyuk, Vasilii P.
AU - Bagryanskaya, Irina Yu
AU - Samsonenko, Denis G.
PY - 2019/11/21
Y1 - 2019/11/21
N2 - The first observation of luminescence for Mn(ii) complexes with a square-pyramidal geometry (C4v) of the metal is reported. The complexes of such type, namely [Mn(L)2Hal]X, where L is an O,O′-chelating ligand Me2N-CH(Ph2PO)2, Hal = Cl or Br, and X = Br, I or [MnCl4], show at ambient temperature red photoluminescence (λemmax ≈ 620 nm) with millisecond lifetimes (3.8-7.6 ms). This emission, stemming from spin-forbidden 4E(G) → 6A1(S) transitions in square-pyramidally coordinated Mn2+, is found to be responsive to temperature. Upon cooling the complexes from 300 to 77 K, the red-shift of the emission band by ≈20 nm takes place, which is accompanied by the increase of its integral intensity and lifetime. The peculiarities of the discovered Mn2+(C4v) luminescence are discussed against the classical luminescence that occurs in octahedral (Oh) and tetrahedral (Td) surroundings.
AB - The first observation of luminescence for Mn(ii) complexes with a square-pyramidal geometry (C4v) of the metal is reported. The complexes of such type, namely [Mn(L)2Hal]X, where L is an O,O′-chelating ligand Me2N-CH(Ph2PO)2, Hal = Cl or Br, and X = Br, I or [MnCl4], show at ambient temperature red photoluminescence (λemmax ≈ 620 nm) with millisecond lifetimes (3.8-7.6 ms). This emission, stemming from spin-forbidden 4E(G) → 6A1(S) transitions in square-pyramidally coordinated Mn2+, is found to be responsive to temperature. Upon cooling the complexes from 300 to 77 K, the red-shift of the emission band by ≈20 nm takes place, which is accompanied by the increase of its integral intensity and lifetime. The peculiarities of the discovered Mn2+(C4v) luminescence are discussed against the classical luminescence that occurs in octahedral (Oh) and tetrahedral (Td) surroundings.
KW - ORGANIC-INORGANIC HYBRID
KW - RED-LIGHT EMISSION
KW - HIGH QUANTUM YIELD
KW - PHOTO-LUMINESCENCE
KW - MANGANESE HALIDE
KW - SINGLE-CRYSTAL
KW - HIGH-PRESSURE
KW - TRIBOLUMINESCENCE
KW - PHOTOLUMINESCENCE
KW - COMPLEXES
UR - http://www.scopus.com/inward/record.url?scp=85074552173&partnerID=8YFLogxK
U2 - 10.1039/c9dt03283e
DO - 10.1039/c9dt03283e
M3 - Article
C2 - 31650991
AN - SCOPUS:85074552173
VL - 48
SP - 16448
EP - 16456
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 43
ER -
ID: 22321660