Fluorescence Energy Transfer in Dendritic Poly(l-lysine)s Combining Thirty-two Free Base- and Zinc(II)-porphyrins in Scramble Fashion

Abstract

Dendritic poly(l-lysine)s combining thirty-two free base- and Zn(II)-porphyrins in scramble fashion were successfully synthesized and exhibited highly efficient (85%) fluorescence energy transfer from Zn(II)-porphyrins to free base-porphyrins.

New Molecular Arrays Based on a Tin(IV) Porphyrin Scaffold

“…Porphyrin arrays are useful in many research areas encompassing biomimetic photosynthesis, molecular electronics, molecular catalysis, etc. − Most of the porphyrin arrays reported so far have been synthesized via typical organic reaction sequences carried out at the porphyrin peripheral (i.e., pyrrole β or meso ) position(s). − In recent years, “inorganic” reactions that can be conducted at the axial sites of porphyrin-bound metal ions have also been employed for the construction of metalloporphyrin arrays. − Adapting this latter “axial-bonding” strategy and utilizing the well-known oxophilicity of metalloid ions, we have constructed a series of trimers based on phosphorus(V), tin(IV). or germanium(IV) porphyrin scaffolds. , The structure of a representative, axial-bonding-type trimer, viz., 1 , is shown in Figure .…”

“…[1][2][3] Most of the porphyrin arrays reported so far have been synthesized via typical organic reaction sequences carried out at the porphyrin peripheral (i.e., pyrrole β or meso) position(s). [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] In recent years, "inorganic" reactions that can be conducted at the axial sites of porphyrin-bound metal ions 22 have also been employed for the construction of metalloporphyrin arrays. [23][24][25][26][27][28][29][30][31][32] Adapting this latter "axial-bonding" strategy and utilizing the well-known oxophilicity of metalloid ions, we have constructed a series of trimers based on phosphorus(V), tin(IV).…”

Dendrimer Porphyrins and Phthalocyanines

“…As a reference compound, dendrimer 29b, which contains randomly mixed P Zn and P FB units on the dendrimer surface, shows a much higher energy transfer efficiency (85%). 129 Thus, the photoexcitation of a P Zn unit in 29a might be followed by energy migration, although with a certain loss of energy, to neighboring P Zn units in the same hemisphere before transfer to a P FB unit in the other hemisphere takes place.…”

Photoinduced hydrogen evolution with peptide dendrimer-multi-Zn(II)-porphyrin, viologen, and hydrogenase

“…To develop an artificial system, which has more native‐like properties and can remove the complexity of the natural counterparts, numerous attempts were examined in the field of de novo designed peptides8–11 and porphyrin‐conjugated macromolecules 12–15. On the other hand, dendrimers have attracted much attention in the field of polymer chemistry in recent years 16–25. Dendrimers are hyperbranched artificial macromolecules with well‐defined three‐dimensional shapes, and their end groups are more dense with the increase of the dendrimer generation.…”

“…Unlike most synthetic macromolecules of linear chains, dendrimers adopt construction of synthetic higher‐ordered structure directly. In particular, some dendrimers have been focused on the function of light harvesting by their morphological similarity to LH 20–25. Using dendrimers as a template to combine de novo designed protein technologies, the assembly condition and functionalization of peptides may be controlled directly and exactly.…”