Hogen-Esch

A. D. Broske and co-workers, in T. E. Hogen-Esch and J. Smid, eds., Kecent Advances in Anionic Polymerisation, Elsevier, New York, 1987, p. 363. 

A good deal of work has been done on polymeric crown ethers during the last decade. Hogen Esch and Smid have been major contributors from the point of view of cation binding properties, and Blasius and coworkers have been especially interested in the cation selectivity of such species. Montanari and coworkers have developed a number of polymer-anchored crowns for use as phase transfer catalysts. Manecke and Storck have recently published a review titled Polymeric Catalysts , which may be useful to the reader in gaining additional perspective. 

For the purpose of our discussion, a polycrown is here defined as a polymer system arising by polymerization of a crown monomer unit. Extensive work has been done in this field by Kopolow, Hogen Esch and Smid and the examples presented here are taken from a paper by all three of these workers. A typical preparation of vinylbenzo-15-crown-5 is accomplished according to the scheme shown as Eq. (6.25). One might also have utilized a formylation/Wittig sequence on benzo-15-crown-5 to accomplish the same end. 

Muller AHE (1987) in Hogen Esch T, Smid J (eds) Recent advances in anionic polymerization. Elsevier Publ., N.Y., p 205... 

We would like to thank Army Research Office for its financial support. We also thank Dr. T. E. Hogen-Esch for helpful suggestions and Dr. H. E. Hall for sending us a pivalolactone sample. 

H. Pledger Jr., John J. Meister, T. E. Hogen-Esch, G. B. Butler, Proceedings of the 54th Annual Fall Tech. Confer., Soc. Petrol. Eng > SPE Paper 8422, Las Vegas, NV, 9/23-26/79... 

It has been pointed out already that formation of a radical anion by a redox process in solution produces an ion pair and that any hopping of the electrons will thus be bound to the migration of the cation, which then becomes rate-limiting (Gerson et al., 1972, 1974, 1990). The, ion-pair structure of the radicals is mainly affected by the size of the counterions and the ion-solvating capability of the solvent (Hogen-Esch, 1977 Szwarc, 1968). 

M Sudhakar, PI Djurovich, TE Hogen-Esch, and ME Thompson, Phosphorescence quenching by conjugated polymers, J. Am. Chem. Soc., 125 7796-7797, 2003. 

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