Triplet energies of π-conjugated polymers

被引:245
作者
Monkman, AP [1 ]
Burrows, HD
Hartwell, LJ
Horsburgh, LE
Hamblett, I
Navaratnam, S
机构
[1] Univ Durham, Dept Phys, Durham, England
[2] Univ Coimbra, Dept Chem, P-3049 Coimbra, Portugal
[3] Christie Hosp, Paterson Inst Canc Res, Manchester, Lancs, England
关键词
D O I
10.1103/PhysRevLett.86.1358
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Using pulse radiolysis and triplet energy transfer has enabled us to measure the triplet energies in a broad range of different pi -conjugated polymers. In all eases we find that the 1(3)B(u) is Of order 0.6 to 1 eV below the 1 B-1(u), indicative of localized triplet states with strong electron-electron correlation. We also observe that the 1(1)A(g)-1(3)B(u), gap decreases linearly as the I(1)A(g)-1(1)B(u) gap decreases even though polymers with very different structure have been studied. This surprising result suggests that polymers with singlet gap <1.3 eV will have a triplet ground state.
引用
收藏
页码:1358 / 1361
页数:4
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