Hole burning of porphines fixed in a polymerized lipid bilayer membrane

Abstract

Porphine derivatives containing four alkyl chains with unpolymerizable or polymerizable hydrophilic end groups in peripheral positions were incorporated into polymerizable lipid bilayers. Hole burning of the porphine derivative which was copolymerized in the liposome environment required much smaller energies for the hole-burning photochemistry as compared to monomolecularly dispersed porphine in a polymerized liposome environment. The distribution of the nonpolymerizable porphine was changed upon the polymerization of the lipid matrix, whereas the polymerizable porphine guest molecule maintained its dispersed state. This is, to our knowledge, the first system that allows the preparation of very highly concentrated host-guest systems (>10~2 mol/L) suitable for hole burning.

Structure and electronic properties of quinizarin chemisorbed on alumina

“…Considering experiments with other materials 73,74 it is supposed that the stiffness of the bonds in the system is very important for high temperature PSHB. Hard bonds cause high phonon energies and thus higher temperatures are necessary to excite these phonons.…”

Synthesis of polymerizable and amphiphilic (porphinato)irons and their copolymers with polymerizable phospholipid

“…without 1; A, 1/3 mixture before the polymerization.phenyl)]porphyrinn is reacted with n-(benzyloxy)-2,2-dimethylalkanoic(n) acid (n =8, 14, 20) according to our previous papers12,13to yield 5,10,15,20-tetrakis[a,a,a,a- o-(2,,2,-dimethyl-n-hydroxyalkan(n)amido)phenyl]porphyrin (n = 8) 5a; n = 14, 5b; n = 20, 5c). Reaction of 5 with muconic acid chloride gives la-c.…”