{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T13:06:46Z","timestamp":1776431206699,"version":"3.51.2"},"reference-count":64,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,21]],"date-time":"2022-12-21T00:00:00Z","timestamp":1671580800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"SMolBits project within the LOEWE program","award":["5778\/4-1"],"award-info":[{"award-number":["5778\/4-1"]}]},{"name":"DFG Heisenberg","award":["5778\/4-1"],"award-info":[{"award-number":["5778\/4-1"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>This study examines the synthesis of two geminal bisphosphonate ester-supported Ln3+ complexes [Ln(L3)2(NO3)3] (Ln = Nd3+ (5), La3+ (6)) and optical properties of the neodymium(III) complex. These results are compared to known mono-phosphonate ester-based Nd3+ complexes [Nd(L1\/L2)3X3]n (X = NO3\u2212, n = 1; Cl\u2212, n = 2) (1\u20134). The optical properties of Nd3+ compounds are determined by micro-photoluminescence (\u00b5-PL) spectroscopy which reveals three characteristic metal-centered emission bands in the NIR region related to transitions from 4F3\/2 excited state. Additionally, two emission bands from 4F5\/2, 2H9\/2 \u2192 4IJ (J = 11\/2, 13\/2) transitions were observed. PL spectroscopy of equimolar complex solutions in dry dichloromethane (DCM) revealed remarkably higher emission intensity of the mono-phosphonate ester-based complexes in comparison to their bisphosphonate ester congener. The temperature-dependent PL measurements enable assignment of the emission lines of the 4F3\/2 \u2192 4I9\/2 transition. Furthermore, low-temperature polarization-dependent measurements of the transitions from R1 and R2 Stark sublevel of 4F3\/2 state to the 4I9\/2 state for crystals of [Nd(L3)2(NO3)3] (5) are discussed.<\/jats:p>","DOI":"10.3390\/molecules28010048","type":"journal-article","created":{"date-parts":[[2022,12,21]],"date-time":"2022-12-21T06:11:24Z","timestamp":1671603084000},"page":"48","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Luminescent Properties of Phosphonate Ester-Supported Neodymium(III) Nitrate and Chloride Complexes"],"prefix":"10.3390","volume":"28","author":[{"given":"Miriam","family":"Gerstel","sequence":"first","affiliation":[{"name":"Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7294-5095","authenticated-orcid":false,"given":"Ingo","family":"Koehne","sequence":"additional","affiliation":[{"name":"Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1974-8292","authenticated-orcid":false,"given":"Johann Peter","family":"Reithmaier","sequence":"additional","affiliation":[{"name":"Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0551-3633","authenticated-orcid":false,"given":"Rudolf","family":"Pietschnig","sequence":"additional","affiliation":[{"name":"Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4756-3818","authenticated-orcid":false,"given":"Mohamed","family":"Benyoucef","sequence":"additional","affiliation":[{"name":"Institute of Nanostructure Technologies and Analytics (INA) and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"H\u00e4nninen, P., and H\u00e4rm\u00e4, H. 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