التفاصيل البيبلوغرافية
| العنوان: |
Luminescent halido(aryl) Pt(IV) complexes obtained via oxidative addition of iodobenzene or diaryliodonium salts to bis-cyclometalated Pt(II) precursors. |
| المؤلفون: |
López-López JC; Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 19, 30100 Murcia, Spain. pgh@um.es., Bautista D; Área Científica y Técnica de Investigación, Universidad de Murcia, Campus de Espinardo, 21, 30100 Murcia, Spain., González-Herrero P; Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 19, 30100 Murcia, Spain. pgh@um.es. |
| المصدر: |
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2021 Oct 05; Vol. 50 (38), pp. 13294-13305. Date of Electronic Publication: 2021 Oct 05. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101176026 Publication Model: Electronic Cited Medium: Internet ISSN: 1477-9234 (Electronic) Linking ISSN: 14779226 NLM ISO Abbreviation: Dalton Trans Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Cambridge, UK : Royal Society of Chemistry, c2003- |
| مستخلص: |
The synthesis of bis-cyclometalated halido(aryl) Pt(IV) complexes [PtX(Ar)(C^N) 2 ], with C^N = cyclometalated 4-( tert -butyl)-2-phenylpyridine (bppy), 2-( p -tolyl)pyridine (tpy), 2-(2-thienyl)pyridine (thpy), or 1-phenylisoquinoline (piq), X = I, Cl, or F, and Ar = Ph (for all C^N ligands) or t -BuPh (for C^N = tpy), and the photophysical properties of the chlorido and fluorido series is reported. The oxidative addition of iodobenzene to cis -[Pt(C^N) 2 ] precursors is demonstrated to occur in MeCN under irradiation with visible light to give complexes [PtI(Ph)(C^N) 2 ], presumably involving radical species that also produce the activation of the solvent to give cyanomethyl complexes [PtI(CH 2 CN)(C^N) 2 ]. The introduction of an aryl ligand can also be achieved by reacting cis -[Pt(C^N) 2 ] with (Ar 2 I)PF 6 (Ar = Ph, t -BuPh), which affords cationic intermediates of the type [Pt(Ar)(C^N) 2 (NCMe)] + . The subsequent addition of an iodide or chloride salt gives the corresponding iodido- or chlorido(aryl) complexes. The fluorido(aryl) derivatives can be obtained from the iodido complexes by halide exchange using AgF. The chlorido- and fluorido(aryl) complexes display intense phosphorescence in deaerated CH 2 Cl 2 solution and poly(methyl methacrylate) (PMMA) films at 298 K from triplet excited states primarily localized on the cyclometalated ligands ( 3 LC) with a small MLCT admixture. Compared with the chlorido complexes, the fluorido derivatives consistently present significantly shorter emission lifetimes and higher radiative and nonradiative rate constants due to a greater MLCT contribution to the emissive state. In contrast, the introduction of the t -BuPh group did not induce significant changes in radiative rates with respect to the phenyl complexes. |
| تواريخ الأحداث: |
Date Created: 20210909 Latest Revision: 20211005 |
| رمز التحديث: |
20221213 |
| DOI: |
10.1039/d1dt02349g |
| PMID: |
34499066 |
| قاعدة البيانات: |
MEDLINE |
