{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T08:07:57Z","timestamp":1769587677562,"version":"3.49.0"},"reference-count":32,"publisher":"World Scientific Pub Co Pte Lt","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Porphyrins Phthalocyanines"],"published-print":{"date-parts":[[2012,4]]},"abstract":"<jats:p> In this study an easy access for modification of properties of porphyrin covered TiO<jats:sub>2<\/jats:sub> electrodes by post-assembling metal insertion was investigated. Therefore a new type of phosphonic acid terminated porphyrin was synthesized and immobilized on mesoporous TiO<jats:sub>2<\/jats:sub> electrodes by self-assembling. Surface concentrations in a range of 1.5\u20133.3 \u00d7 10<jats:sup>-8<\/jats:sup> mol.cm<jats:sup>-2<\/jats:sup>, based on the geometric area, were obtained by two independent techniques, UV-vis and cyclic voltammetry. Co(II) , Zn(II) , Pd(II) and Mn(III) ions could be inserted into the immobilized porphyrin by exposing the electrode to a boiling solution of metal chloride in methanol. The electrode surface was characterized by UV-vis spectroscopy and cyclic voltammetry before and after metal insertion. The electrocatalytic activity towards the reduction of molecular oxygen in acidic solution was examined, further confirming metal insertion into immobilized porphyrin monolayer. <\/jats:p>","DOI":"10.1142\/s1088424612500411","type":"journal-article","created":{"date-parts":[[2012,4,25]],"date-time":"2012-04-25T11:42:00Z","timestamp":1335354120000},"page":"351-358","source":"Crossref","is-referenced-by-count":2,"title":["Metal insertion into phosphonic acid terminated porphyrins immobilized on <font>TiO<sub>2<\/sub><\/font> electrodes"],"prefix":"10.1142","volume":"16","author":[{"given":"Martin","family":"Erbacher","sequence":"first","affiliation":[{"name":"Institut f\u00fcr Organische Chemie, FB 2, Universit\u00e4t Bremen, Leobener Str. 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