TY - JOUR
T1 - A dicationic organoplatinum(II) complex containing a bridging 2,5-bis-(4-ethynylphenyl)-[1,3,4]oxadiazole ligand behaves as a phosphorescent gelator for organic solvents
AU - Lu, Wei
AU - Law, Yuen Chi
AU - Han, Jie
AU - Chui, Stephen Sin Yin
AU - Ma, Dik Lung
AU - Zhu, Nianyong
AU - Che, Chi Ming
N1 - This work was supported by the Area of Excellence Scheme established under the University Grants Committee of the Hong Kong SAR, China (AoE/P-10/01) and the Strategic Research Themes on “Bio-nanotechnology”, “Organic Optoelectronics” and “Nanotechnology Research Program” of the University Development Fund of The University of Hong Kong. W.L. thanks The University of Hong Kong for a University Postdoctoral Fellowship and the Small Project Funding.
PY - 2008/1/4
Y1 - 2008/1/4
N2 - A dicationic platinum(II) terpyridyl complex, [(tBu3tpy)Pt(OXD) Pt-(tBu3tpy)](PF6)2 (tBu3tpy=4, 4′,4″-tri-tert-butyl-2,2′:6′,2″-terpyridyl, OXD= 2,5-bis(4-ethynylphenyl)[1,3,4]oxadiazole) formed phosphorescent organogels in acetonitrile or in a mixture of acetonitrile and alcohol. The structure and properties of these emissive gels were analyzed by polarizing optical and confocal laser scanning microscopy, and by variable-temperature 1H NMR, UV/Vis, and emission spectroscopy. Dry gels were studied by scanning electron microscopy, powder X-ray diffraction (PXRD), and small-angle X-ray scattering (SAXS). SEM images of the dry gel revealed a network of interwoven nanofibers (diameter 12-60 nm, length > 5 μm). Intermolecular π-π interactions between the [(tBu3tpy)PtC≡C] moieties could be deduced from the variable 1H NMR spectra. The PXRD and SAXS data showed that the assembly of the gelator could be represented by a rectangular 2D lattice of 68 Å x 14 Å. The ability of the complex to gelate a number of organic solvents is most likely due to intermolecular π-π interactions between the [(tBu3tpy)PtC≡C] moieties.
AB - A dicationic platinum(II) terpyridyl complex, [(tBu3tpy)Pt(OXD) Pt-(tBu3tpy)](PF6)2 (tBu3tpy=4, 4′,4″-tri-tert-butyl-2,2′:6′,2″-terpyridyl, OXD= 2,5-bis(4-ethynylphenyl)[1,3,4]oxadiazole) formed phosphorescent organogels in acetonitrile or in a mixture of acetonitrile and alcohol. The structure and properties of these emissive gels were analyzed by polarizing optical and confocal laser scanning microscopy, and by variable-temperature 1H NMR, UV/Vis, and emission spectroscopy. Dry gels were studied by scanning electron microscopy, powder X-ray diffraction (PXRD), and small-angle X-ray scattering (SAXS). SEM images of the dry gel revealed a network of interwoven nanofibers (diameter 12-60 nm, length > 5 μm). Intermolecular π-π interactions between the [(tBu3tpy)PtC≡C] moieties could be deduced from the variable 1H NMR spectra. The PXRD and SAXS data showed that the assembly of the gelator could be represented by a rectangular 2D lattice of 68 Å x 14 Å. The ability of the complex to gelate a number of organic solvents is most likely due to intermolecular π-π interactions between the [(tBu3tpy)PtC≡C] moieties.
KW - Acetylides
KW - Gels
KW - Luminescence
KW - Platinum
KW - Self-assembly
UR - http://www.scopus.com/inward/record.url?scp=38449103616&partnerID=8YFLogxK
U2 - 10.1002/asia.200700265
DO - 10.1002/asia.200700265
M3 - Journal article
C2 - 18058958
AN - SCOPUS:38449103616
SN - 1861-4728
VL - 3
SP - 59
EP - 69
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
IS - 1
ER -