[{"extern":"1","language":[{"iso":"eng"}],"keyword":["solid-state nmr","Ansa-ferrocene","DFT calculations","Oligophosphine","Polyphosphane","Ring-opening polymerization"],"user_id":"100715","_id":"63943","status":"public","abstract":[{"lang":"eng","text":"A lithium halide exchange reaction at low-temperature, via the treatment of 2,6-di(isopropyl)phenyllithium on 1,1′-bis-(dichlorophosphino)ferrocene, resulted in the first isolated example of an aryl-substituted diphospha [2]ferrocenophane (diphospha [2]FCP) 2. Although compound 2 did not show any recognizable thermal reaction at higher temperature (up to 350 °C), its tert-butyl-substituted counterpart 1 underwent a clean selective heat-mediated P–C cleavage reaction, followed by an inter-molecular rearrangement, to produce a P–P fused bis [3]ferrocenophane 3 with all-trans oriented P-chain, which upon further heating gave a polyferrocenylphosphane tBu-[Fc’P2]n-tBu (4). Since polymer 4 is insoluble in common organic solvents, it has been characterized with solid-state techniques, including solid-state NMR. Density functional theory (DFT) has further been employed to identify possible pathways for P–C bond cleavage on 1 and 2, as well as to evaluate accessible pathways for further polymerization toward 4."}],"publication":"Polymer","type":"journal_article","title":"Oligo- and polymerization of phospha [2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles","volume":242,"date_created":"2026-02-07T09:10:38Z","author":[{"first_name":"Subhayan","last_name":"Dey","full_name":"Dey, Subhayan"},{"full_name":"Kargin, Denis","last_name":"Kargin","first_name":"Denis"},{"first_name":"Mark V.","full_name":"Höfler, Mark V.","last_name":"Höfler"},{"first_name":"Balazs","last_name":"Szathmari","full_name":"Szathmari, Balazs"},{"full_name":"Bruhn, Clemens","last_name":"Bruhn","first_name":"Clemens"},{"first_name":"Torsten","last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165"},{"full_name":"Kelemen, Zsolt","last_name":"Kelemen","first_name":"Zsolt"},{"last_name":"Pietschnig","full_name":"Pietschnig, Rudolf","first_name":"Rudolf"}],"date_updated":"2026-02-17T16:18:36Z","page":"124589","intvolume":"       242","citation":{"apa":"Dey, S., Kargin, D., Höfler, M. V., Szathmari, B., Bruhn, C., Gutmann, T., Kelemen, Z., &#38; Pietschnig, R. (2022). Oligo- and polymerization of phospha [2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles. <i>Polymer</i>, <i>242</i>, 124589.","mla":"Dey, Subhayan, et al. “Oligo- and Polymerization of Phospha [2]Ferrocenophanes to One Dimensional Phosphorus Chains with Ferrocenylene Handles.” <i>Polymer</i>, vol. 242, 2022, p. 124589.","short":"S. Dey, D. Kargin, M.V. Höfler, B. Szathmari, C. Bruhn, T. Gutmann, Z. Kelemen, R. Pietschnig, Polymer 242 (2022) 124589.","bibtex":"@article{Dey_Kargin_Höfler_Szathmari_Bruhn_Gutmann_Kelemen_Pietschnig_2022, title={Oligo- and polymerization of phospha [2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles}, volume={242}, journal={Polymer}, author={Dey, Subhayan and Kargin, Denis and Höfler, Mark V. and Szathmari, Balazs and Bruhn, Clemens and Gutmann, Torsten and Kelemen, Zsolt and Pietschnig, Rudolf}, year={2022}, pages={124589} }","chicago":"Dey, Subhayan, Denis Kargin, Mark V. Höfler, Balazs Szathmari, Clemens Bruhn, Torsten Gutmann, Zsolt Kelemen, and Rudolf Pietschnig. “Oligo- and Polymerization of Phospha [2]Ferrocenophanes to One Dimensional Phosphorus Chains with Ferrocenylene Handles.” <i>Polymer</i> 242 (2022): 124589.","ieee":"S. Dey <i>et al.</i>, “Oligo- and polymerization of phospha [2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles,” <i>Polymer</i>, vol. 242, p. 124589, 2022.","ama":"Dey S, Kargin D, Höfler MV, et al. Oligo- and polymerization of phospha [2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles. <i>Polymer</i>. 2022;242:124589."},"year":"2022"},{"author":[{"first_name":"Ruth D.","last_name":"Rittinghaus","full_name":"Rittinghaus, Ruth D."},{"last_name":"Schäfer","full_name":"Schäfer, Pascal M.","first_name":"Pascal M."},{"first_name":"Pascal","last_name":"Albrecht","full_name":"Albrecht, Pascal"},{"last_name":"Conrads","full_name":"Conrads, Christian","first_name":"Christian"},{"full_name":"Hoffmann, Alexander","last_name":"Hoffmann","first_name":"Alexander"},{"first_name":"Agnieszka N.","last_name":"Ksiazkiewicz","full_name":"Ksiazkiewicz, Agnieszka N."},{"first_name":"Olga","full_name":"Bienemann, Olga","last_name":"Bienemann"},{"first_name":"Andrij","last_name":"Pich","full_name":"Pich, Andrij"},{"first_name":"Sonja","full_name":"Herres-Pawlis, Sonja","last_name":"Herres-Pawlis"}],"date_created":"2019-09-11T10:58:09Z","volume":12,"date_updated":"2022-01-06T06:51:30Z","doi":"10.1002/cssc.201900481","title":"New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts","issue":"10","citation":{"mla":"Rittinghaus, Ruth D., et al. “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts.” <i>ChemSusChem</i>, vol. 12, no. 10, 2019, pp. 2161–65, doi:<a href=\"https://doi.org/10.1002/cssc.201900481\">10.1002/cssc.201900481</a>.","short":"R.D. Rittinghaus, P.M. Schäfer, P. Albrecht, C. Conrads, A. Hoffmann, A.N. Ksiazkiewicz, O. Bienemann, A. Pich, S. Herres-Pawlis, ChemSusChem 12 (2019) 2161–2165.","bibtex":"@article{Rittinghaus_Schäfer_Albrecht_Conrads_Hoffmann_Ksiazkiewicz_Bienemann_Pich_Herres-Pawlis_2019, title={New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts}, volume={12}, DOI={<a href=\"https://doi.org/10.1002/cssc.201900481\">10.1002/cssc.201900481</a>}, number={10}, journal={ChemSusChem}, author={Rittinghaus, Ruth D. and Schäfer, Pascal M. and Albrecht, Pascal and Conrads, Christian and Hoffmann, Alexander and Ksiazkiewicz, Agnieszka N. and Bienemann, Olga and Pich, Andrij and Herres-Pawlis, Sonja}, year={2019}, pages={2161–2165} }","apa":"Rittinghaus, R. D., Schäfer, P. M., Albrecht, P., Conrads, C., Hoffmann, A., Ksiazkiewicz, A. N., … Herres-Pawlis, S. (2019). New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts. <i>ChemSusChem</i>, <i>12</i>(10), 2161–2165. <a href=\"https://doi.org/10.1002/cssc.201900481\">https://doi.org/10.1002/cssc.201900481</a>","ieee":"R. D. Rittinghaus <i>et al.</i>, “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts,” <i>ChemSusChem</i>, vol. 12, no. 10, pp. 2161–2165, 2019.","chicago":"Rittinghaus, Ruth D., Pascal M. Schäfer, Pascal Albrecht, Christian Conrads, Alexander Hoffmann, Agnieszka N. Ksiazkiewicz, Olga Bienemann, Andrij Pich, and Sonja Herres-Pawlis. “New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts.” <i>ChemSusChem</i> 12, no. 10 (2019): 2161–65. <a href=\"https://doi.org/10.1002/cssc.201900481\">https://doi.org/10.1002/cssc.201900481</a>.","ama":"Rittinghaus RD, Schäfer PM, Albrecht P, et al. New Kids in Lactide Polymerization: Highly Active and Robust Iron Guanidine Complexes as Superior Catalysts. <i>ChemSusChem</i>. 2019;12(10):2161-2165. doi:<a href=\"https://doi.org/10.1002/cssc.201900481\">10.1002/cssc.201900481</a>"},"intvolume":"        12","page":"2161-2165","year":"2019","user_id":"40778","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"13185","language":[{"iso":"eng"}],"keyword":["bioplastics","guanidines","iron","lactide","ring-opening polymerization"],"type":"journal_article","publication":"ChemSusChem","status":"public","abstract":[{"lang":"eng","text":"Abstract Polylactide is a biodegradable versatile material based on annually renewable resources and thus CO2-neutral in its lifecycle. Until now, tin(II)octanoate [Sn(Oct2)] was used as catalyst for the industrial ring-opening polymerization of lactide in spite of its cytotoxicity. On the way towards a sustainable catalyst, three iron(II) hybrid guanidine complexes were investigated concerning their molecular structure and applied to the ring-opening polymerization of lactide. The complexes could polymerize unpurified technical-grade rac-lactide as well as recrystallized l-lactide to long-chain polylactide in bulk with monomer/initiator ratios of more than 5000:1 in a controlled manner following the coordination–insertion mechanism. For the first time, a biocompatible complex has surpassed Sn(Oct)2 in its polymerization activity under industrially relevant conditions."}]}]