DICP OpenIR
Tuning the emission properties of cyclometalated platinum(II) complexes by intramolecular electron-sink/arylethynylated ligands and its application for enhanced luminescent oxygen sensing
Wu, Wanhua1; Wu, Wenting1; Ji, Shaomin1; Guo, Huimin2; Song, Peng3; Han, Keli3; Chi, Lina1; Shao, Jingyin1; Zhao, Jianzhang1
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
2010
DOI10.1039/c0jm01794a
Volume20Issue:43Pages:9775-9786
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Materials Science
WOS KeywordPHOTOPHYSICAL PROPERTIES ; TRIPLET EMITTERS ; EXCITED-STATE ; ACETYLIDE CHROMOPHORES ; MESOPOROUS SILICA ; OLED APPLICATIONS ; WHITE-LIGHT ; FLUORESCENT ; SENSORS ; PROBE
AbstractWe have synthesized five novel cyclometalated Pt(II) complexes (aryl-ppy)Pt(acac) (ppy = 2-phenyl pyridine, aryl N-butyl naphthalimide (NI) ethynylene for Pt-1, N-butyl naphthalimide (NI)-CH(2) CO for Pt-2, 4-cyanophenyl CH(2) CO for Pt-3, naphthal ethynylene for Pt-4 and naphthal-diketo for Pt-5). For the first time, pi-conjugation of the ppy ligands was extended via the C C bond. Deep red/near IR emission (638 nm-700 nm) was observed for the complex containing naphthalimide ethynylene subunit (Pt-1), whereas the close analogue Pt-2 (in which the linker between the NI and the ppy subunit is a -CH(2)CO- group) shows a relatively blue-shifted emission (540 nm-570 nm) but much longer luminescent lifetime (tau = 25.5 mu s) than Pt-1 (tau = 6.6 mu s). Simultaneous fluorescence/phosphorescence emissions were observed for Pt-1 and Pt-2, but other complexes show sole phosphorescent emission. The red-shifted phosphorescence of the complexes compared to the model complex ppyPt(acac) (486 nm) was attributed to either the significant electron-sink effect of the NI fragment (Pt-1) (for which the electron withdrawing effect is stronger than the previously reported fluoren-9-one), or the extended pi-conjugation of the ppy ligand (via C C bond) (e. g. Pt-4). The substantial tuning of the emission color and the luminescent lifetimes (0.86 mu s-25.5 mu s) of the complexes were rationalized by theoretical calculations (DFT/TDDFT), i.e. the emissive triplet excited states were assigned as the normal (3)MLCT state (give smaller tau values) or the novel ligand-localized (3)IL emissive state (give larger tau values). With tuning the luminescent lifetimes, the luminescent O(2) sensitivity of the complexes was improved by 117-fold (Stern-Volmer quenching constants K(SV) = 0.234 Torr(-1) for Pt-2 vs. K(SV) = 0.002 Torr(-1) for Pt-5).
Language英语
WOS IDWOS:000283603000028
Citation statistics
Cited Times:66[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142010
Collection中国科学院大连化学物理研究所
Affiliation1.Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem Engn, Dalian 116012, Peoples R China
2.Dalian Univ Technol, Dept Chem, Sch Chem Engn, Dalian 116012, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Wu, Wanhua,Wu, Wenting,Ji, Shaomin,et al. Tuning the emission properties of cyclometalated platinum(II) complexes by intramolecular electron-sink/arylethynylated ligands and its application for enhanced luminescent oxygen sensing[J]. JOURNAL OF MATERIALS CHEMISTRY,2010,20(43):9775-9786.
APA Wu, Wanhua.,Wu, Wenting.,Ji, Shaomin.,Guo, Huimin.,Song, Peng.,...&Zhao, Jianzhang.(2010).Tuning the emission properties of cyclometalated platinum(II) complexes by intramolecular electron-sink/arylethynylated ligands and its application for enhanced luminescent oxygen sensing.JOURNAL OF MATERIALS CHEMISTRY,20(43),9775-9786.
MLA Wu, Wanhua,et al."Tuning the emission properties of cyclometalated platinum(II) complexes by intramolecular electron-sink/arylethynylated ligands and its application for enhanced luminescent oxygen sensing".JOURNAL OF MATERIALS CHEMISTRY 20.43(2010):9775-9786.
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