Inorganic Chemistry最新文献_第2页

Cross-Dehydrogenative Coupling of Secondary Amines with Silanes Catalyzed by Agostic Iridium-NSi Species

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-22 DOI: 10.1021/acs.inorgchem.4c04512

Marina Padilla, María Batuecas, Pilar García-Orduña, Israel Fernández, Francisco J. Fernández-Álvarez

{"title":"Cross-Dehydrogenative Coupling of Secondary Amines with Silanes Catalyzed by Agostic Iridium-NSi Species","authors":"Marina Padilla, María Batuecas, Pilar García-Orduña, Israel Fernández, Francisco J. Fernández-Álvarez","doi":"10.1021/acs.inorgchem.4c04512","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04512","url":null,"abstract":"An active catalytic system for the cross-dehydrogenative coupling (CDC) of a wide range of secondary amines with silanes is reported. The iridium(III) derivatives [Ir(H)(X)(κ2-NSiDMQ)(L)] (NSiDMQ = {4,8-dimethylquinoline-2-yloxy}dimethylsilyl; L = coe, X = Cl, 2; L = coe, X = OTf, 3; L = PCy3, X = Cl, 4; L = PCy3, X = OTf, 5), which are stabilized by a weak yet noticeable Ir···H–C agostic interaction between the iridium and one of the C–H bonds of the 8-Me substituent of the NSiDMQ ligand, have been prepared and fully characterized. These species have proven to be effective catalysts for the CDC of secondary amines with hydrosilanes. The best catalytic performance (TOF1/2 = 79,300 h–1) was obtained using 5 (0.25 mol %), N-methylaniline, and HSiMe2Ph. The catalytic activity of the species [Ir(H)(OTf)(κ2-NSiQ)(PCy3)] (10, NSiQ = {quinoline-2-yloxy}dimethylsilyl) and [Ir(H)(OTf)(κ2-NSiMQ)(PCy3)] (11, NSiMQ = {4-methylquinoline-2-yloxy}dimethylsilyl), related to 5 but lacking the 8-Me substituent, is markedly lower than that found for 5. This fact highlights the crucial role of the 8-Me substituent of the NSiDMQ ligand in enhancing the catalytic performance of these iridium complexes.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"125 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Stability of High-Energy-Density Niobium Nitrides under High-Pressure Conditions

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-21 DOI: 10.1021/acs.inorgchem.4c03331

Huawei Chen, Maxim Bykov, Iskander G. Batyrev, Lukas Brüning, Elena Bykova, Mohammad F. Mahmood, Stella Chariton, Vitali B. Prakapenka, Timofey Fedotenko, Konstantin Glazyrin, Mohamed Mezouar, Gaston Garbarino, Andrew Steele, Alexander F. Goncharov

引用次数: 0

Synthesis of Hollowed Polyoxometalate with a Flipped VO5 Unit by the Elimination of a Centered Organic Molecule

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-21 DOI: 10.1021/acs.inorgchem.4c04682

Yuji Kikukawa, Mayumi Taga, Yusuke Horikawa, Ryoji Mitsuhashi, Yoshihito Hayashi

{"title":"Synthesis of Hollowed Polyoxometalate with a Flipped VO5 Unit by the Elimination of a Centered Organic Molecule","authors":"Yuji Kikukawa, Mayumi Taga, Yusuke Horikawa, Ryoji Mitsuhashi, Yoshihito Hayashi","doi":"10.1021/acs.inorgchem.4c04682","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04682","url":null,"abstract":"Mechanistic understanding of the formation of clusters plays a role in designing the structure-dependent properties. Based on the fact that anions act as templates to form spherical polyoxovanadates, various structures were reported by changing anions in the synthetic solution. In this work, another factor in the formation of spherical polyoxometalates was demonstrated. By the reaction of [V10O26]4– in acetonitrile with a reductant to increase the number of tetravalent V4+ and p-toluene sulfonic acid to convert tetrahedral VO4 units to square-pyramidal VO5, acetonitrile-containing polyoxovanadate [V24O60(CH3CN)]6– (ICH3CN) was synthesized. The bulky and hydrophobic aromatic rings prevented the formed anions from acting as a template. By changing the synthetic solvent, encapsulated moieties were controlled. Nitromethane was also encapsulated to afford [V24O60(CH3NO2)]6– (ICH3NO2). When acetone was used as the solvent, the contaminated water was encapsulated to form [V24O60(H2O)]6– (IH2O). The encapsulated acetonitrile molecule was eliminated by heating ICH3CN up to 230 °C under N2 flow conditions to give hollowed polyoxovanadate [V24O60]6– (II), even though ICH3CN possesses no pores for acetonitrile to pass. From the X-ray crystallographic analysis of II, one of the 24 VO5 units was flipped. The electrochemical properties and catalytic performances between ICH3CN and II were also investigated.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"29 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dinuclear Rare-Earth β-Diketiminates with Bridging 3,5-Ditert-butyl-catecholates: Synthesis, Structure, and Single-Molecule Magnet Properties

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-21 DOI: 10.1021/acs.inorgchem.4c03278

Svetlana V. Klementyeva, Michael T. Gamer, Michael Schulze, Nithin Suryadevara, Artem S. Bogomyakov, Pavel A. Abramov, Sergey N. Konchenko, Mario Ruben, Wolfgang Wernsdorfer, Eufemio Moreno-Pineda

{"title":"Dinuclear Rare-Earth β-Diketiminates with Bridging 3,5-Ditert-butyl-catecholates: Synthesis, Structure, and Single-Molecule Magnet Properties","authors":"Svetlana V. Klementyeva, Michael T. Gamer, Michael Schulze, Nithin Suryadevara, Artem S. Bogomyakov, Pavel A. Abramov, Sergey N. Konchenko, Mario Ruben, Wolfgang Wernsdorfer, Eufemio Moreno-Pineda","doi":"10.1021/acs.inorgchem.4c03278","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c03278","url":null,"abstract":"The dinuclear β-diketiminato complex [L1ClDy(μ-Cl)3DyL1(THF)] (1) (L1 = {2,6-iPr2C6H3–NC(Me)CHC(Me)N-2,6-iPr2C6H3}−) was obtained by reaction of DyCl3 with KL1 in a molar ratio of 1:1 and used for the preparation of the mixed-ligand complex [L1Dy(μ-3,5-Cat)]2 (2) by salt metathesis reaction with 3,5-CatK2 (3,5-Cat −3,5-di-tert-butyl-catecholate). Reactions of 3,5-CatNa2 with [L2LnCl2(THF)2] (Ln3+ = Dy, Y) ligated with the less bulky ligand L2 = {2,4,6-Me3C6H2–NC(Me)CHC(Me)N-2,4,6-Me3C6H2}− afforded the mixed-ligand THF-containing complexes [L2Ln(μ-3,5-Cat)(THF)]2 (Ln3+ = Dy (3a), Y (3b)). All new complexes were fully characterized, and the solid-state structures were determined by single-crystal X-ray diffraction. Magnetic measurements revealed single-molecule magnet behavior for the dysprosium complexes. Sub-Kelvin μSQUID studies confirm the SMM character of the systems, while CASSCF calculation along with simulation of the experimental data yields an antiferromagnetic interaction operating between the Dy3+ ions.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"44 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bifunctional In3+ Doping toward Defect Engineering in SrTiO3 for Solar Water Splitting

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-21 DOI: 10.1021/acs.inorgchem.4c04676

Lijing Xiang, Luyu Shi, Junhao Jiang, Yalei Qin, Ruize Xu, Xinyi Zhu, Wenjie Li, Fan Fang, Kun Chang

{"title":"Bifunctional In3+ Doping toward Defect Engineering in SrTiO3 for Solar Water Splitting","authors":"Lijing Xiang, Luyu Shi, Junhao Jiang, Yalei Qin, Ruize Xu, Xinyi Zhu, Wenjie Li, Fan Fang, Kun Chang","doi":"10.1021/acs.inorgchem.4c04676","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04676","url":null,"abstract":"Defect engineering in SrTiO3 crystals plays a pivotal role in achieving efficient overall solar water splitting, as evidenced by the influence of Al3+ ions. However, the uneven structural relaxation caused by Al3+ ions has been overlooked, significantly affecting the defect state and catalytic activity. When an Al2O3 crucible is used, optimizing this defect engineering presents a significant challenge. In this study, we introduced In3+ into the SrTiO3 crystal to achieve favorable photocatalytic performance. Notably, In3+ stabilizes at the B sites of SrTiO3, outcompeting Al3+, demonstrating a bifunctional effect by simultaneously regulating the concentration of defect charges and mitigating the negative impact of Al3+ on structural relaxation, leading to shallow-state defects. Additionally, the incorporation of In3+ ions effectively prevents the precipitation of perovskite Sr2+. Carrier behavior studies and density functional theory (DFT) calculations provide substantial evidence of the underlying modulating mechanism. Consequently, the optimized In3+-doped SrTiO3 exhibits impressive gas evolution rates of 1.40 mmol·h–1 H2 and 0.69 mmol·h–1 O2 under full-spectrum light irradiation, corresponding to a promising apparent quantum yield (AQY) of 82.36% at 365 nm and a solar-to-hydrogen (STH) efficiency of 0.54%. Such enhanced activity could be attributed to the effective incorporation of In3+ ions, which improves the structural stability of the perovskite SrTiO3 lattice.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"112 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Binding of a Co(III) Metalloporphyrin to Amines in Water: Influence of the pKa and Aromaticity of the Ligand, and pH-Modulated Allosteric Effect

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-21 DOI: 10.1021/acs.inorgchem.4c04183

Lilia Milanesi, Rosa M. Gomila, Antonio Frontera, Salvador Tomas

{"title":"Binding of a Co(III) Metalloporphyrin to Amines in Water: Influence of the pKa and Aromaticity of the Ligand, and pH-Modulated Allosteric Effect","authors":"Lilia Milanesi, Rosa M. Gomila, Antonio Frontera, Salvador Tomas","doi":"10.1021/acs.inorgchem.4c04183","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04183","url":null,"abstract":"Metalloporphyrins have been widely utilized as building blocks for molecular self-assembly in organic solvents, but their application in water is less common due to competition from water molecules for the metal center. However, Co(III) metalloporphyrins are notable for their strong binding to two aromatic amine ligands in aqueous buffers. In this study, we present a comprehensive investigation of the binding behavior of Co(III) tetraphenyl sulfonic acid porphyrin with selected aromatic and aliphatic amines in aqueous solution. Our findings reveal that the ligand affinity is influenced by the pKa values of both the ligand and the porphyrin, as well as the hybridization state of the nitrogen atom, with binding to sp3-hybridized nitrogen being significantly weaker than to sp2-hybridized nitrogen. DFT calculations further suggest that the variations in binding affinities are due to differences in the electrostatic potential at the nitrogen atoms, with aromatic ligands generally exhibiting stronger Co–N coordination due to greater electrostatic attraction. Moreover, our study and the binding model we developed demonstrate that changes in pH affect the affinity for each ligand to varying degrees, sometimes resulting in an allosteric cooperative effect. This effect is linked to electronic changes introduced by the binding of the first ligand. Our model provides a predictive tool for understanding the assembly behavior of these porphyrins in aqueous buffers, with potential applications in developing more efficient catalysts and in the creation of smart materials for fields ranging from catalysis to nanomedicine and optoelectronics","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"175 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Conductive Non-Calcined 2D Cu0.3Co0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-20 DOI: 10.1021/acs.inorgchem.4c05162

Soheila Sanati, David B. Cordes, Alexandra M. Z. Slawin, Jinjie Qian, Reza Abazari

{"title":"Highly Conductive Non-Calcined 2D Cu0.3Co0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater","authors":"Soheila Sanati, David B. Cordes, Alexandra M. Z. Slawin, Jinjie Qian, Reza Abazari","doi":"10.1021/acs.inorgchem.4c05162","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c05162","url":null,"abstract":"Global clean energy demands can be effectively addressed using the promising approach of hydrogen energy generation combined with less energy consumption. Hydrogen can be generated, and urea-rich wastewater pollution can be mitigated in a low-energy manner using the urea oxidation reaction (UOR). This paper seeks to assemble a unique electrocatalyst of a pristine 2D MOF, [Co(HBTC)(DMF)]n (Co-MUM-3), from 1,3,5-benzenetricarboxylate (BTC) to oxidize urea in simulated seawater. Ni foam (NF)-based working electrodes were fabricated by incorporating a series of heterometallic CuCo-MUM-3 frameworks (Cu0.1Co0.9-MUM-3, Cu0.2Co0.8-MUM-3, Cu0.3Co0.7-MUM-3, and Cu0.4Co0.6-MUM-3), after which their application in the urea oxidation reaction was examined. A very low required overpotential [1.26 V vs reversible hydrogen electrode (RHE) in 1 M KOH + 0.5 M NaCl (simulated seawater) + 0.33 M urea] and a Tafel slope of 112 mV dec–1 could be observed for the Cu0.3Co0.7-MUM-3 electrocatalyst, ensuring the achievement of urea electro-oxidation and hydrogen evolution reactions at a corresponding 10 mA cm–2 electrocatalytic current density. A relatively lower overpotential will be evident compared to other reported pristine MOFs, outperforming the commercial catalyst RuO2 (1.41 V at 10 mA cm–2, 131 mV dec–1) and ensuring considerable stability at significantly high current densities for a minimum of 72 h.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"269 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Platinum–Acetylide Complexes as Nonfullerene Acceptors in Organic Photovoltaic Systems

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-20 DOI: 10.1021/acs.inorgchem.4c04160

Tomoki Nishiyama, Taiki Yamaoka, Zi Lang Goo, Hirotaka Kitoh-Nishioka, Senku Tanaka, Kunihisa Sugimoto, Takashi Okubo

{"title":"Platinum–Acetylide Complexes as Nonfullerene Acceptors in Organic Photovoltaic Systems","authors":"Tomoki Nishiyama, Taiki Yamaoka, Zi Lang Goo, Hirotaka Kitoh-Nishioka, Senku Tanaka, Kunihisa Sugimoto, Takashi Okubo","doi":"10.1021/acs.inorgchem.4c04160","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04160","url":null,"abstract":"Three distinct n-type semiconductors were derived from a platinum-trialkyl phosphine complex; to lower their LUMO levels, various indene derivatives were incorporated using thiophene (PtTIC (1)), thieno[3,2-b]thiophene (PtT2IC (2)), and 4H-cyclopenta[2,1-b:3,4-b′]dithiophene (PtCDTIC (3)) as the acetylide donor units. Single-crystal X-ray diffractometry analysis revealed translinear platinum–acetylide complexation in all cases. The strong (═O···S) interactions between the oxygen atoms of the indene acceptor units and the sulfur atoms of the thiophene-derived donor units induced a highly planar orientation among the heterocyclic ligands, featuring π–π interactions between the planes. Platinum complexes 1, 2, and 3 exhibited strong absorption in the 500–800 nm range, resulting from efficient intramolecular charge transfer transitions from the central platinum-containing donor unit to the terminal acceptors, as well as unique emission in the near-infrared region owing to the heavy-atom effect. The ultraviolet photoelectron spectroscopy results indicated that the LUMO levels were comparable to those of typical nonfullerene acceptors (NFAs). The n-type semiconductors comprising 1, 2, and 3 as NFAs exhibited photoelectric conversion properties in the corresponding organic photovoltaics. The highest conversion efficiency (3.0%) was attained by complex 3.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"10 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cage-Based Metal–Organic Framework Featuring a Double-Yolk Core–Shell U6L3@U18L14 Structure for Iodine Capture

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-20 DOI: 10.1021/acs.inorgchem.4c04490

Shuang Deng, Xianghe Kong, Xuan Fu, Zhi-Wei Huang, Zhi-Heng Zhou, Lei Mei, Ji-Pan Yu, Li-Yong Yuan, Yan-Qiu Zhu, Nan-Nan Wang, Kong-Qiu Hu, Wei-Qun Shi

{"title":"Cage-Based Metal–Organic Framework Featuring a Double-Yolk Core–Shell U6L3@U18L14 Structure for Iodine Capture","authors":"Shuang Deng, Xianghe Kong, Xuan Fu, Zhi-Wei Huang, Zhi-Heng Zhou, Lei Mei, Ji-Pan Yu, Li-Yong Yuan, Yan-Qiu Zhu, Nan-Nan Wang, Kong-Qiu Hu, Wei-Qun Shi","doi":"10.1021/acs.inorgchem.4c04490","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04490","url":null,"abstract":"Cage-based MOFs, with their customizable chemical environments and precisely controllable nanospaces, show great potential for the selective adsorption of guest molecules with specific structures. In this work, we have constructed a novel cage-based MOF [(CH3)2NH2]2[(UO2)2(TMTTA)]·11.5DMF·2H2O (IHEP-51), utilizing a triazine derivative poly(carboxylic acid), 4,4′,4″-(((1,3,5-triazine-2,4,6-triyl)tris(((4-carboxycyclohexyl)methyl)azanediyl))tris(methylene))tribenzoic acid (H6TMTTA), as an organic ligand and uranyl as a metal node. The 2-fold interpenetrated (3,6,6)-connected framework of IHEP-51 features two types of supramolecular cage structures: the Pyrgos[2]cage U6L3 and the huge cage U18L14. They are further assembled into a double-yolk core–shell U6L3@U18L14 structure, making it suitable for I2 capture. The maximum adsorption capacities of IHEP-51 for iodine in solution and gaseous iodine are 420.4 and 1561.2 mg·g–1, respectively. XPS, Raman spectra, single-crystal X-ray diffraction, and DFT calculations reveal that the adsorbed iodine is located inside the U6L3 Pyrgos[2]cage in the form of I3–, thus resulting in the formation of a (I3)2@U6L3@U18L14 ternary core–shell structure.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"13 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, Luminescence, and Electrochemistry of Tris-Chelate Platinum(IV) Complexes with Cyclometalated N-Heterocyclic Carbene Ligands and Aromatic Diimines

IF 4.6 2区化学

Inorganic Chemistry Pub Date : 2024-12-19 DOI: 10.1021/acs.inorgchem.4c04446

José Serrano-Guarinos, Adrián Jiménez-García, Delia Bautista, Pablo González-Herrero, Ángela Vivancos

{"title":"Synthesis, Luminescence, and Electrochemistry of Tris-Chelate Platinum(IV) Complexes with Cyclometalated N-Heterocyclic Carbene Ligands and Aromatic Diimines","authors":"José Serrano-Guarinos, Adrián Jiménez-García, Delia Bautista, Pablo González-Herrero, Ángela Vivancos","doi":"10.1021/acs.inorgchem.4c04446","DOIUrl":"https://doi.org/10.1021/acs.inorgchem.4c04446","url":null,"abstract":"Dicationic, C2-symmetrical, tris-chelate Pt(IV) complexes of general formula [Pt(trz)2(N∧N)](OTf)2, bearing two cyclometalated 4-butyl-3-methyl-1-phenyl-1H-1,2,3-triazol-5-ylidene (trz) ligands and one aromatic diimine [N∧N = 2,2′-bipyridine (bpy, 2), 4,4′-di-tert-butyl-2,2′-bipyridine (dbbpy, 3), 4,4′-dimethoxi-2,2′-bipyridine (dMeO-bpy, 4), 1,10-phenanthroline (phen, 5), 4,7-diphenyl-1,10-phenanthroline (bphen, 6), dipyrido[3,2-a:2′,3′-c]phenazine (dppz, 7), or 2,3-diphenylpyrazino[2,3-f][1,10]phenanthroline (dpprzphen, 8)] are obtained through chloride abstraction from [PtCl2(trz)2] (1) using AgOTf in the presence of the corresponding diimine. Complexes 2–4 show long-lived phosphorescence from 3LC excited states involving the diimine ligand, with quantum yields that reach 0.18 in solution and 0.58 in the solid matrix at room temperature for 3. Derivatives with more extended aromatic systems show dual phosphorescent/fluorescent emissions (5, 6) or mainly fluorescence (7, 8) in solution. Comparisons with similar complexes bearing cyclometalated 2-arylpyridines instead of aryl-N-heterocyclic carbenes indicate that the {Pt(trz)2} subunit is crucial to enable efficient emissions from diimine-centered excited states. It is also shown that the introduction of protective bulky substituents on the diimine, such as the tert-butyl groups in 3, is a key strategy to reach higher emission efficiencies. The new compounds represent rare examples of luminescent Pt(IV) complexes that show quasi-reversible one-electron reductions, indicating an unusually high redox stability.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"88 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0