000079153 001__ 79153
000079153 005__ 20240122154813.0
000079153 0247_ $$2doi$$a10.1002/chem.201800646
000079153 0248_ $$2sideral$$a107084
000079153 037__ $$aART-2018-107084
000079153 041__ $$aeng
000079153 100__ $$aArnal, L.
000079153 245__ $$aThe Use of Cyclometalated NHCs and Pyrazoles for the Development of Fully Efficient Blue PtII Emitters and Pt/Ag Clusters
000079153 260__ $$c2018
000079153 5060_ $$aAccess copy available to the general public$$fUnrestricted
000079153 5203_ $$aNew bis-pyrazole complexes [Pt(C^C*)(RpzH)2]X, containing a cyclometalated N-heterocyclic carbene ligand (HC^C*=1-(4-(ethoxycarbonyl)phenyl)-3-methyl-1H-imidazol-2-ylidene) were prepared as chloride (X=Cl-, RpzH: 3,5-Me2pzH 1¿a, 4-MepzH 2¿a, pzH 3¿a), perchlorate (X=ClO4-, 1¿b–3¿b), or hexafluorophosphate (X=PF6-, RpzH: 3,5-Me2pzH 1¿c) salts. The X-ray structure of 1¿a showed that the Cl- anion is trapped by the cation through two N-H···Cl bonds. In solution of methanol, acetone and THF at RT, 1¿a–3¿a coexist in equilibrium with the corresponding [PtCl(C^C*)(RpzH)] (B) and RpzH species. In CH2Cl2, this equilibrium takes place just for 2¿a and 3¿a, but it is completely shifted to the left at 243 and 223 K for 2¿a and 3¿a, respectively. The low-lying absorption and emission bands were assigned to intraligand (ILCT) charge transfer on the NHC group. Quantum yield measurements in PMMA films revealed that 1¿b, 2¿b and 1¿c are amongst the most efficient blue-light emitters, with values up to 100¿%. Proton abstraction from the coordinated 3,5-Me2pzH in 1¿b by NEt3 and replacement by Ag+ afforded a neutral [Pt2Ag2] cluster containing Pt¿Ag dative bonds.
000079153 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E21$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2015-67461-P
000079153 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000079153 590__ $$a5.16$$b2018
000079153 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b36 / 172 = 0.209$$c2018$$dQ1$$eT1
000079153 592__ $$a1.842$$b2018
000079153 593__ $$aCatalysis$$c2018$$dQ1
000079153 593__ $$aOrganic Chemistry$$c2018$$dQ1
000079153 593__ $$aChemistry (miscellaneous)$$c2018$$dQ1
000079153 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000079153 700__ $$0(orcid)0000-0003-1812-3175$$aFuertes, S.
000079153 700__ $$0(orcid)0000-0002-4808-574X$$aMartín, A.$$uUniversidad de Zaragoza
000079153 700__ $$0(orcid)0000-0002-0257-0483$$aSicilia, V.$$uUniversidad de Zaragoza
000079153 7102_ $$12010$$2760$$aUniversidad de Zaragoza$$bDpto. Química Inorgánica$$cÁrea Química Inorgánica
000079153 773__ $$g24, 37 (2018), 9377-9384$$pChemistry (Weinh.)$$tChemistry - A European Journal$$x0947-6539
000079153 8564_ $$s261447$$uhttps://zaguan.unizar.es/record/79153/files/texto_completo.pdf$$yPostprint
000079153 8564_ $$s21180$$uhttps://zaguan.unizar.es/record/79153/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000079153 909CO $$ooai:zaguan.unizar.es:79153$$particulos$$pdriver
000079153 951__ $$a2024-01-22-15:32:16
000079153 980__ $$aARTICLE