TY - JOUR
T1 - Synthesis, characterization and spectroscopic studies of cyclometalated platinum(II) complexes containing meta-bis(2-pyridoxy)benzene
AU - Chiu, Brenda Ka Wen
AU - Lam, Michael Hon Wah
AU - Lee, Derek Yiu Kin
AU - Wong, Wai Yeung
N1 - Funding Information:
The work described in this paper was jointly funded by a grant from the Research Grants Council of Hong Kong SAR, China (CityU 1108/02P) and a Grant from CityU (Project No. 7001281).
PY - 2004/9/15
Y1 - 2004/9/15
N2 - A series of mononuclear and binuclear cyclometalated platinum(II) complexes containing new terdentate meta -bis(2-pyridoxy)benzene ligands: 3,5-bis(2-pyridoxy)toluene (L1H) and 3,5-bis(2-pyridoxy)-2-dodecylbenzene (L2H): [Pt(L1)Cl] (1), [Pt(L2)Cl] (2), [Pt(L1) (CH3CN)](ClO4) (3), {[Pt(L1)] 2(μ-dppm)}(ClO4)2 (4), {[Pt(L2)]2(μ-dppm)} (ClO4)2 (5), {[Pt(L1)]2 (μ-pyrazole)}(ClO4) (6), {[Pt(L2)]2 (μ-pyrazole)}(ClO4) (7), {[Pt(L1)]2 (μ-imidazole)}(ClO4) (8) and {[Pt(L2)]2(μ-imidazole)} (ClO4) (9), have been synthesized and characterized. These ligands are coordinated to platinum(II) in a "pincer"-like manner and the presence of pyridyl donors enhances the availability of the ligand π* orbitals for electronic transition. Spectroscopic properties of these cyclometalated complexes were studied. While the non-coplanar nature of the ligands hinders ligand-ligand and metal-metal interactions in these cyclometalated complexes, the presence of long hydrocarbon side chain on ligand L2H seems to alleviate such hindrance. Intermolecular, and possibly Pt-Pt interactions were observed in complex 2 at high concentration.
AB - A series of mononuclear and binuclear cyclometalated platinum(II) complexes containing new terdentate meta -bis(2-pyridoxy)benzene ligands: 3,5-bis(2-pyridoxy)toluene (L1H) and 3,5-bis(2-pyridoxy)-2-dodecylbenzene (L2H): [Pt(L1)Cl] (1), [Pt(L2)Cl] (2), [Pt(L1) (CH3CN)](ClO4) (3), {[Pt(L1)] 2(μ-dppm)}(ClO4)2 (4), {[Pt(L2)]2(μ-dppm)} (ClO4)2 (5), {[Pt(L1)]2 (μ-pyrazole)}(ClO4) (6), {[Pt(L2)]2 (μ-pyrazole)}(ClO4) (7), {[Pt(L1)]2 (μ-imidazole)}(ClO4) (8) and {[Pt(L2)]2(μ-imidazole)} (ClO4) (9), have been synthesized and characterized. These ligands are coordinated to platinum(II) in a "pincer"-like manner and the presence of pyridyl donors enhances the availability of the ligand π* orbitals for electronic transition. Spectroscopic properties of these cyclometalated complexes were studied. While the non-coplanar nature of the ligands hinders ligand-ligand and metal-metal interactions in these cyclometalated complexes, the presence of long hydrocarbon side chain on ligand L2H seems to alleviate such hindrance. Intermolecular, and possibly Pt-Pt interactions were observed in complex 2 at high concentration.
KW - Cyclometalated complexes
KW - meta-Bis(2-pyridoxy)benzene
KW - Pincer ligands
KW - Platinum(II) complexes
KW - Pt Pt interactions
UR - http://www.scopus.com/inward/record.url?scp=4344584577&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2004.06.006
DO - 10.1016/j.jorganchem.2004.06.006
M3 - Journal article
AN - SCOPUS:4344584577
SN - 0022-328X
VL - 689
SP - 2888
EP - 2899
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 18
ER -