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Luminescent Properties of Phosphonate Ester-Supported Neodymium(III) Nitrate and Chloride Complexes.
| Content Provider | Europe PMC |
|---|---|
| Author | Gerstel, Miriam Koehne, Ingo Reithmaier, Johann Peter Pietschnig, Rudolf Benyoucef, Mohamed |
| Editor | Chi, Yun |
| Copyright Year | 2022 |
| Abstract | 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-, n = 1; Cl-, n = 2) (1-4). The optical properties of Nd3+ compounds are determined by micro-photoluminescence (µ-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 → 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 → 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. |
| Journal | Molecules |
| Volume Number | 28 |
| DOI | 10.3390/molecules28010048 |
| PubMed Central reference number | PMC9822372 |
| Issue Number | 1 |
| PubMed reference number | 36615242 |
| e-ISSN | 14203049 |
| Language | English |
| Publisher | Molecular Diversity Preservation International (MDPI) |
| Publisher Date | 2022-12-21 |
| Access Restriction | Open |
| Subject Keyword | photoluminescence spectroscopy lanthanide phosphonate ester ligands neodymium X-ray |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Medicine Chemistry Drug Discovery Pharmaceutical Science Analytical Chemistry Molecular Medicine Organic Chemistry |
