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Electro-optical properties investigation of a series of hydroxylphenylporphyrins

机译：一系列羟基卟啉的电光特性研究

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A one-step method was used to synthesize five hydroxylphenylporphyrin monomers with different structures [R.G. Little, J. Hetero-cyclic Chem. 18 (1981) 129]. They were confirmed by means of different spectroscopic analysis methods. The effects of the number and the position of the peripheral hydroxylphenyl groups of the porphyrin ring and solvents on their fluorescence spectra were discussed according to the change of the UV spectra. It was found that the fluorescence intensity was enhanced with an increase in the number of the peripheral hydroxylphenyl groups of the porphyrin ring. It was also found that the fluorescence intensity at 430 nm was very weak for tetrahydroxylphenylporphyrin (TPP) and tetraphenylporphyrin (5). This phenomenon is related to the structural symmetry. The red shift of the fluorescence spectra in polar solvent DMF relative to that in CH_2Cl_2 can be explained on the basis of the effect of solvation. The fluorescence intensity of hydroxylphenylporphyrin 2 in DMF at 430 nm is much stronger than that in CH_2Cl_2. The surface photovoltaic property of TPP and hydroxylphenylporphyrins 1-5 was studied by means of surface photovoltage spectra (SPS) and field induced surface photovoltage spectra (FISPS), which reveals that all the hydroxylphenylporphyrin are P-type semiconductors. The SPV spectral bands of all the hydroxylphenylporphyrins correspond to the π → π~* transition. The SPS was similar to the UV-Vis spectra. It has also been found that the stronger the fluorescence intensity is, the weaker the surface photovoltage intensity is. For all the hydroxylphenylporphyrins and TPP, the surface photovoltage (SPV) of TPP is the weakest, that of hydroxylphenylporphyrin 1 is the strongest, then the SPV of the other hydroxylphenylporphyrins are gradually weakened with an increase in the number of the peripheral hydroxylphenyl groups of the porphyrin ring. This result indicates that controlling the number and position of the peripheral hydroxylphenyl substituting groups of the porphyrin ring and using different solvents could obtain the porphyrins with different electro-optical properties.
机译：用不同结构合成五种羟基苯基卟啉单体的一步法[R.G.小，J.杂环化​​学。 18（1981）129]。通过不同的光谱分析方法确认它们。根据UV光谱的变化，讨论了卟啉环的数量和卟啉环的周围羟基苯基的位置和溶剂的位置。发现荧光强度随着卟啉环的外周羟基苯基的数量的增加而增强。还发现，对于四氢苯基苯乙烯（TPP）和四苯基卟啉（5），430nm处的荧光强度非常弱。这种现象与结构对称有关。可以基于溶剂化的效果来解释相对于CH_2Cl_2中的极性溶剂DMF中的荧光光谱的红色移位。在430nm处，DMF中羟基苯基卟啉2的荧光强度比CH_2Cl_2中的更强烈。通过表面光伏光谱（SPS）和野外诱导表面光伏光谱（FISP）研究了TPP和羟基苯基卟啉1-5的表面光伏性能，揭示了所有羟基苯基卟啉是p型半导体。所有羟基苯基的SPV光谱带对应于π→π〜*过渡。 SPS类似于UV-VIS光谱。还发现荧光强度越强，表面光伏强度越弱。对于所有羟基苯基卟啉和TPP，TPP的表面光电图（SPV）是最弱的，羟基苯基卟啉1的最弱是最强的，然后通过增加的外周羟基苯基的数量逐渐削弱其它羟基苯基的SPV。卟啉环。该结果表明，控制卟啉环和使用不同溶剂的外周羟基苯基的数量和位置可以获得具有不同电光性质的卟啉。

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