Modification of interfacial reactivity by the microenvironment. Metallation of porphyrins in monolayer films and assemblies
✍ Scribed by R.H. Schmehl; G.L. Shaw; D.G. Whitten
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 434 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
An ïnvestigation of metaktion of severai surfactant porph~rïns in organized monolayer assemblies and at a monolayer fti-soiution
ïderface is reported_ The several surfactant porphyrïns all readily incorporate Cu** in solution; in contrast metallation of the same compound with 0.1~) -m assemblies and at a 5hn-solution interface occurs at wideIy dïffering raates. The ease of metallation in the organized media can be correIated wïth the microenvironment of theporphyrïn;porphyrins in hydrophilic sïtes in or near the interface are readily metallated while those in more hydrophobic sïtes are nat Several dïfferent metal ions can be incorporated into porphyrïns lying near the hydrophïlïc interface; however, the order of reactivity differs appreciably from that observed in solution. ?ïhus M2, which is diffkult to ïncorporate in solutions, is readily introduced , Co**, Ni*+, Mn** and Zn** react well in both solution and assemblées whiIe Ni*'and Fe*' , whïch undergoes faci!e reaction in solution, are not ïncorporated ïnto the assemblées.