Synthesis and electrochemical studies of ortho-substituted porphyrins

[[abstract]]本研究包含合成meso 位置上以nitrophenyl, aniline, 1,3-diphenylurea, nicotinanilide 取代的紫質，?用電化學和光譜電化學方法，瞭解?同鄰位取代基 和?目對紫質還原電位和其光譜變化的影響。 以循環伏安法及光譜電化學的觀察結果，可推斷aniline(推電子基) 的取代會使紫質環較難還原；nitrophenyl, 1,3-diphenylurea, nicotinanilide (?電子基) 的取代會使紫質環較?還原。而隨著單取代變?為雙取代紫質時，電位移動的現象 也變的較為明顯。 並進一步以循環伏安法的研究結果，觀察還原H2(o-APurea)2(mesityl)2P 和 H2(o-APnic)2(mesityl)P 時，分子內氫鍵對紫質環節結構的影響。[[abstract]]We have synthesized free-base porphyrins with nitrophenyl, aniline,1,3-diphenylurea, and nicotinanilide on the meso-position successfully. The cyclic voltammetry and spectroelectrochemical studies have also been investigated. By cyclic voltammetry and spectroelectrochemistry studies, the electron-donatinggroup (aniline) would make the reduction potential of the porphyrin ring negatively. Oppositely, the electron-withdrawing group (nitrophenyl, 1,3-diphenylurea,nicotinanilide) made the reduction of the porphyrin positively. With the increasing ofthe meso-substituents, the substituent effect was obvious easily. The effect of internal hydrogen binding on the structure of free-base porphyrins(H2(o-APurea)2(mesityl)2P, H2(o-APnic)2(mesityl)P) also could be observed by Cyclic voltammetry.[[note]]碩