Dear Colleagues,

Organometallic chemistry has become an impactful area of chemistry and is employed in many areas of chemistry. Organometallic chemistry is now as vibrant and exciting as ever, with research impacting photo-, electro-, and thermal catalysis, main-group chemistry, chemical biology, lanthanides and actinides, organic synthesis, and materials science. For instance, luminescent organometallic compounds are broadly used to produce electroluminescent devices, fluorescent sensors, and labels for the visualization of biological structures and processes and in oxygen mapping and generation of singlet oxygen, drug delivery tracking, sensing of different ions in the solution, and sensing of small molecules. There is no limit to the applications of organometallic chemistry. Organometallic chemistry is involved in constructing cage compounds, coordination polymers, MOFs, supramolecular systems, nanostructured materials, nanotechnology, molecular magnets, and many more.

Hence, this Special Issue, celebrating the 10^th Anniversary of Inorganics intends to bring the role of organometallic chemistry and related applications into the spotlight, thus allowing readers to appreciate organometallic chemistry as a paramount area of chemical sciences that is intertwined with many other fields ranging from industrial to medical applications to nanotechnology. This Special Issue offers the unique opportunity for exchange between scientists and researchers in organometallic chemistry in mostly chemistry (inorganic and organic), (bio)medicinal chemistry, polymer chemistry, metallocene, industrial chemistry, catalysis, material, and nanotech fields. Communications, original research and comprehensive review papers, and perspectives contributing to the field are welcome.

Prof. Dr. Francis Verpoort
Prof. Dr. Claudio Pettinari
Prof. Dr. Maurizio Peruzzini
Prof. Dr. Richard Layfield
Prof. Dr. Rainer Winter
Prof. Dr. Moris S. Eisen
Dr. Gábor Papp
Prof. Dr. Shuang Xiao
Prof. Dr. Axel Klein
Guest Editors

Manuscript Submission Information

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• organometallic compounds
• transition metals
• lanthanides
• actinides
• main group elements
• organometallic compounds in catalysis
• organometallic compounds in photocatalysis
• organometallic compounds in electrocatalysis
• organometallic compounds in thermocatalysis
• organometallic compounds as molecular emitters
• organometallic compounds in bio-imaging
• organometallic compounds in electroluminescence
• organometallic compounds in sensing
• organometallic compounds in energy conversion
• organometallic compounds in light harvesting
• organometallic compounds in magnetism
• organometallic compounds in photonics
• organometallic compounds in coordination polymer
• organometallic compounds in metal–organic framework
• organometallic compounds in materials science
• organometallic compounds in supramolecular chemistry and in crystal engineering
• computational/theoretical organometallic chemistry
• further areas for development and new perspectives

Title: Luminescent diimine-Pt(IV) complexes with axial phenyl selenide ligands
Authors: Marzieh Dadkhah Aseman; Reza Babadi Aghakhanpour; Zohreh Sharifioliaei; Masoud Nabavizadeh; Axel Klein
Affiliation: Tarbiat Modares University
Abstract: Luminescent diimine-Pt(IV) complexes [Pt(N^N)(Me)2(PhSe)2], (N^N = 2,2ʹ-bipyridine (bpy, 1b), 1,10-phenanthroline (phen, 2b), and 4,4ʹ-dimethyl-2,2ʹ-bipyridine (Me2bpy, 3b), PhSe‒ = phenyl selenide, were prepared and identified by multinuclear (1H, 13C{1H} and 77Se{1H}) NMR spectroscopy. The PhSe‒ ligands are introduced by oxidative addition of diphenyl diselenide to the non-luminescent Pt(II) precursors [Pt(N^N)(Me)2], N^N = (bpy, 1a), (phen, 2a), (Me2bpy, 3a), to give the luminescent Pt(IV) complexes 1b to 3b. The UV-vis absorption spectra of 1b to 3b are characterised by strong bands in the range 240 to 330 nm, assigned to transitions of essentially π‒π* character with admixtures from metal and PhSe‒ ligand contributions with the help of TD-DFT (time-dependent density functional theory) calculations. Also, the weak long-wavelength bands in the range 350 to 475 nm are of mixed ligand-to-metal charge transfer (LʹMCT) (n(Se)d(Pt) / intra-ligand charge transfer (ILʹCT) (n(Se)π*(Ph) or π(Ph)π*(Ph))/ ligand-to-ligand’ charge transfer (LLʹCT) (L = N^N, Lʹ = PhSe‒, M = Pt and n = lone pair) character. The Pt(IV) complexes showed broad emission bands in the solid state at 298 and 77 K peaking at 560 to 595 nm with a blue-shift upon cooling. Structured emission bands were obtained in the range 450 to 600 nm with maxima depending on the N^N ligands and the solvent polarity (CH2Cl2 vs. dimethyl sulfoxide (dmso) and aqueous tris(hydroxymethyl)aminomethane hydrochloride (tris-HCl) buffer). The emissions stem from essentially ligand-centred triplet states (3LC) with mixed π‒π*, LʹLCT and ILʹCT character and small admixtures of LʹMCT and MLCT contributions.

Title: Progress on noble-metal free organic-inorganic hybrids for electrochemical water oxidation
Authors: Zheng Tan 1, Lihua Zhang 1,2, Tong Wu 1,2, Yinbo Zhan1,2, Bowei Zhou 1 , Yilin Dong1,2, and Xia Long 1,*
Affiliation: 1 China-UK Low Carbon College, Shanghai Jiao Tong University; 2 School of Mechanical Engineering, Shanghai Jiao Tong University
Abstract: Emerging as a new class of advanced functional materials with hierarchical architectures and re-dox characters, the organic-inorganic hybrids have been well developed and widely applied in various applications recently. In this review, we focus on the applications and struc-ture-performance relationship of organic-inorganic hybrids for electrochemical water splitting. The general principles of water oxidation will be firstly presented, followed by the progresses on the applications of organic-inorganic hybrids that are classified as MOFs and their derivates, COFs-based hybrids and other organic-inorganic hybrids. The roles of organic counterparts on catalytic active centers will be fully discussed and highlighted with typical examples. Finally, the challenges and perspectives assessing of this promising hybrid materials as electrocatalysts will be provided.

Title: Mono-alkyl-substituted phosphinoboranes (HRP–BH2–NMe3) as precursors for poly(alkylphosphinoborane)s: improved synthesis and comparative study
Authors: Felix Lehnfeld; Tim Oswald; Rüdiger Beckhaus; Manfred Scheer
Affiliation: University of Regensburg
Abstract: A new synthetic pathway to various mono-alkyl-substituted phosphinoboranes HRP–BH2–NMe3 has been developed. The new synthetic route starting from alkyl halides and NaPH2 followed by metalation and salt metathesis is performed in a one-pot procedure and leads to higher yields and purity of the resulting phosphinoboranes as compared to previously reported routes. Addition-ally, the scope of accessible compounds could be expanded from short-chained linear alkyl sub-stituents to longer chained linear alkyl substituents as well as secondary or functionalized alkyl substituents. The reported examples include primary alkyl-substituted phosphinoboranes RHP-BH2-NMe3 (R = n-butyl, n-pentyl, n-hexyl; 1a-c), the secondary alkyl-substituted derivatives iPrPH-BH2-NMe3 (2) and the functionalized alkyl-substituted 4-bromo-butyl-phosphinoborane (BrC4H8)PH-BH2-NMe3 (3). Compounds 1a, 1c and 2 were additionally used for preliminary polymerization reactions via a thermal and a transition metal-catalyzed pathway, revealing the formation of high molecular weight polymers under certain conditions. Detailed investigations on the influence of temperature, concentration, substituents and reaction time on the respective polymerization reactions were performed.