【摘 要】
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Extensively π-conjugated porphyrin arrays have attracted considerable attention in light of their possible applications to near-infrared dyes.[1,2] Herein,
【机 构】
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KeyLaboratoryofChemicalBiology&TraditionalChineseMedicineResearch(MinistryofEducation)KeyLaboratoryo
【出 处】
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The First Asian Conference on Porphyrins, Phthalocyanines an
论文部分内容阅读
Extensively π-conjugated porphyrin arrays have attracted considerable attention in light of their possible applications to near-infrared dyes.[1,2] Herein,we first synthesized β-meso linked C4h symmetry porphyrin pentamer,2,7,12,17-tetrakis(meso-porphyrinyl)substituted porphine using the Suzuki coupling reaction.Subsequent oxidative ring closure with DDQ-Sc(OTf)3 affords β-meso,β-meso quadruply linked porphyrin tape.The UV/vis absorption spectra of 1,2 and 4 were recorded in CH2Cl2.The UV/vis absorption spectra of 1 and 2 display split Soret bands and red-shifted Q-bands.And the absorption spectrum of 4 shows six major peaks at 416,508,571,789,945 and 1156 nm,indicating that this porphyrin tape has strong and consecutive absorption from ultraviolet to near infrared region.These novel compounds were comprehensively characterized by 1H NMR,high-resolution mass spectrometry,UV/vis absorption spectrometry and the structures of 2 and 3 were unambiguously elucidated by single-crystal X-ray diffraction analysis.
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