Recent progress and developments of iridium-based compounds as probes for environmental analytes

Phosphorescent mechanochromic materials may change their luminescence color and intensity with large spectral shifts under a mechanical force stimulus.

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Thermal, spectroscopic, X-ray and theoretical studies of metal complexes (sodium, manganese, copper, nickel, cobalt and zinc) with pyrimidine-5-carboxylic and pyrimidine-2-carboxylic acids

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-019-08594-x ◽

2019 ◽

Vol 138 (4) ◽

pp. 2813-2837 ◽

Cited By ~ 1

Author(s):

G. Świderski ◽

R. Świsłocka ◽

R. Łyszczek ◽

S. Wojtulewski ◽

M. Samsonowicz ◽

...

Keyword(s):

Carboxylic Acid ◽

Nitrogen Atom ◽

Metal Complexes ◽

General Formula ◽

Pyrimidine Ring ◽

Carboxylate Ligand ◽

Metal Centers ◽

X Ray ◽

Carboxylate Oxygen ◽

3D Metal Complexes

Abstract The new 3d metal complexes of pyrimidine-2-carboxylic (2PCA) and pyrimidine-5-carboxylic (5PCA) acids were synthesized and characterized using thermal analysis (TG–DSC, TG–FTIR), X-ray, spectroscopic (IR, Raman) methods and theoretical (DFT) studies. In the complexes of pyrimidine-2-carboxylic acid of the general formula M(2PCA)2·xH2O (where 2PCA-pyrimidine-2-carboxylate; M = Mn(II), Co(II), Ni(II), Cu(II) and Zn; x = 0 for Mn and Cu; x = 2 for Co, Ni and Zn) coordination of metal ions occurs through nitrogen atom from pyrimidine ring and carboxylate oxygen atom. The complexes of pyrimidine-5-carboxylic acid of the general formula M(5PCA)2·xH2O (where 5PCA—pyrimidine-5-carboxylate; M = Mn(II), Co(II), Ni(II), Cu(II) and Zn; x = 6 for Cu and 4 for remaining complexes) were obtained as monomeric isostructural compounds. Coordination of metal centers occurs through two nitrogen atom from different pyrimidine-5-carboxylate ligand and four oxygen atoms from water molecules. The IR and Raman spectra of free acids as well as obtained metal(II) complexes were described in detail. Aromaticity (HOMA, EN, GEO and I6) of complexes was determined and discussed. The investigated compounds decompose in air in two main stages connected with dehydration and decomposition/burning of anhydrous compounds to the suitable metal oxides. Thermal decomposition in nitrogen leads to the evolution of water, carbon oxides, ammonia and pyrimidine molecules.

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Übergangsmetallkomplexe mit Schwefelliganden, LXV. Diastereospezifische Alkylierung von [Mo(NO)2(′S2′)2]2- zu chiralen [Mo(NO)2(′RS4')]-Komplexen mit chirotopen und prostereogenen Mo-Zentren / Transition Metal Complexes with Sulfur Ligands, LXV. Diastereospecific Alkylation of [Mo(NO)2(′S2')2]2- to Chiral [Mo(NO)2(′RS4')] Complexes with Chirotopic and Prostereogenic Mo-Centers

Zeitschrift für Naturforschung B ◽

10.1515/znb-1991-1012 ◽

1991 ◽

Vol 46 (10) ◽

pp. 1343-1348 ◽

Cited By ~ 4

Author(s):

Dieter Sellmann ◽

Franz Grasser ◽

Falk Knoch ◽

Matthias Moll

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Parent Compound ◽

Metal Center ◽

Chiral Complexes ◽

Metal Centers ◽

Electronic Character

In order to investigate how chirotopicity and stereogenicity of metal centers influence the enantioselectivity of metal centered reactions the stereogenic properties of metal centers in chiral complexes have to be varied without changing their electronic character. Diastereospecific alkylation of [Mo(NO)2(′S2′ )2]2- by racemic 1,2-dibromopropane and 1,2-dibromobutane yields the title complexes [Mo(NO)2(′MeS4′ )] and [Mo(NO)2(′EtS4′)] that differ from the parent compound [Mo(NO)2('S4′)] with respect to the stereogenicity of the metal center and allow future investigations of the question raised above.

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Dendrimers of Nanometer Size Based on Metal Complexes: Luminescent and Redox-Active Polynuclear Metal Complexes Containing up to Twenty-Two Metal Centers

Chemistry - A European Journal ◽

10.1002/chem.19950010404 ◽

1995 ◽

Vol 1 (4) ◽

pp. 211-221 ◽

Cited By ~ 129

Author(s):

Sebastiano Campagna ◽

Gianfranco Denti ◽

Scolastica Serroni ◽

Alberto Juris ◽

Margherita Venturi ◽

...

Keyword(s):

Metal Complexes ◽

Metal Centers ◽

Nanometer Size ◽

Redox Active ◽

Polynuclear Metal Complexes

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Übergangsmetallkomplexe mit Schwefelliganden, XXXII: Synthese der sterisch anspruchsvollen Thiolat-amin-Liganden tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethan sowie ihrer Eisen-, Ruthenium- und Zink-Komplexe [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] und [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3/ Transition Metal Complexes with Sulfur Ligands, XXXII: Synthesis of the Sterically Demanding New Thiolate-amine Ligands tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethane as well as of their Iron-, Ruthenium- and Zinc Complexes [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] and [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3

Zeitschrift für Naturforschung B ◽

10.1515/znb-1987-1014 ◽

1987 ◽

Vol 42 (10) ◽

pp. 1291-1297 ◽

Cited By ~ 14

Author(s):

Dieter Sellmann ◽

Olaf Käppler

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Acid Hydrolysis ◽

Organic Solvents ◽

Transition Metal Complexes ◽

Zinc Complexes ◽

Metal Centers ◽

Sterically Demanding ◽

Amine Ligands ◽

Soluble Complexes

Abstract In order to obtain soluble complexes containing sterically protected metal centers the new bi- and tetradentate thiolate amine ligands 2-mercapto-3,5-di-tbutylaniline (= tbu2-ma-H) and 1,2-bis(2-mercapto-3,5-di-tbutylanilino)ethane (= tbu4-mae-H2) were synthesized. tbu2-ma-H reacts with FeCl2-4 H2O and CO to give [Fe(CO)2(tbu2-ma)2], with Zn(ac)2 -2 H2O [Zn(tbu2-ma)2] is obtained whose acid hydrolysis and reaction with H2S, respectively, yield pure tbu2-Ina-H. The condensation of tbu2-ma-H with glyoxal yields the respective bis-benzthiazolidine, which is reduced by LiAlH4 in the presence of Na[N(SiMe3)2] to tbu4-bmae-H2. tbu4-bmae-Li2. reacts with [Ru(CO)3(THF)Cl2], [Ru(PMe3)4Cl2] and [Ru(PPh3)2(CH3CN)2Cl2], respectively, to yield [Ru(L)2(Tm4-bmae)j (L = CO, PMe3, PPh3). The complexes are more soluble in organic solvents than the corresponding unsubstituted bmae complexes, bmae2- = 1,2-bis(2-mercaptoanilino)- ethane(2-).

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New aspects in bis and tris(dipyrrinato)metal complexes: bright luminescence, self-assembled nanoarchitectures, and materials applications

Journal of Materials Chemistry A ◽

10.1039/c5ta02040a ◽

2015 ◽

Vol 3 (30) ◽

pp. 15357-15371 ◽

Cited By ~ 76

Author(s):

Ryota Sakamoto ◽

Toshiki Iwashima ◽

Mizuho Tsuchiya ◽

Ryojun Toyoda ◽

Ryota Matsuoka ◽

...

Keyword(s):

Metal Complexes ◽

Recent Progress ◽

Self Assembled ◽

Bright Luminescence

This review summarizes recent progress in bis and tris(dipyrrinato)metal complexes, focusing on luminescence intensification, supramolecules and nanostructures, and materials applications.

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Recent Progress in Transition Metal Complexes Catalyzed Hydrosilylation of Carbon-Carbon Multiple Bonds

Current Organic Chemistry ◽

10.2174/138527211796378415 ◽

2011 ◽

Vol 15 (16) ◽

pp. 2802-2815 ◽

Cited By ~ 11

Author(s):

Jiajian Peng ◽

Ying Bai ◽

Jiayun Li ◽

Guoqiao La

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Recent Progress ◽

Multiple Bonds

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Theranostics of Gold Nanoparticles with an Emphasis on Photoacoustic Imaging and Photothermal Therapy

Current Pharmaceutical Design ◽

10.2174/1381612824666180604112201 ◽

2018 ◽

Vol 24 (23) ◽

pp. 2719-2728 ◽

Cited By ~ 8

Author(s):

Yi Liu ◽

Wenhui Ma ◽

Jing Wang

Keyword(s):

Gold Nanoparticles ◽

Temperature Control ◽

Photothermal Therapy ◽

Recent Progress ◽

Near Infrared ◽

Photoacoustic Imaging ◽

Diagnosis And Treatment ◽

Chemical Characteristics ◽

Nir Light ◽

Physical And Chemical

Gold nanoparticles (AuNPs) are promising biomedical agents in terms of both imaging and therapy, exhibiting excellent physical and chemical characteristics. The actions of AuNPs can be remotely controlled using strong near-infrared (NIR) light, associated with minimal lateral invasion. Employing the photoacoustic (PA) principle, AuNPs integrate imaging and temperature control, affording both diagnosis and treatment mediated by NIR light. We here review recent progress in the theranostic field employing AuNPs to both PA and photothermal ends.

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α-Pyridinyl Alcohols, α,α’-Pyridine Diols, α-Bipyridinyl Alcohols, and α,α’-Bipyridine Diols as Structure Motifs Towards Important Organic Molecules and Transition Metal Complexes

Current Organic Synthesis ◽

10.2174/1570179417666200212111049 ◽

2020 ◽

Vol 17 (5) ◽

pp. 344-366

Author(s):

Tegene T. Tole ◽

Johannes H.L. Jordaan ◽

Hermanus C.M. Vosloo

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Single Molecule ◽

Organic Molecules ◽

Metal Cluster ◽

Metal Center ◽

Phosphine Ligands ◽

High Ability ◽

Metal Centers

Background: The preparation and use of pyridinyl alcohols as ligands showed incredible increment in the past three decades. Important property of pyridinyl alcoholato ligands is their strong basicity, which is mainly due to the lack of resonance stabilization of the corresponding anion. This strongly basic anionic nature gives them high ability to make bridges between metal centers rather than to bind to only one metal center in a terminal fashion. They are needed as ligands due to their ability to interact with transition metals both covalently (with oxygen) and hemilabile coordination (through nitrogen). Objective: The review focuses on the wide application of α-pyridinyl alcohols, α,α’-pyridine diols, α- bipyridinyl alcohols, and α,α’-bipyridine diols as structure motifs in the preparation of important organic molecules which is due to their strongly basic anionic nature. Conclusion: It is clear from the review that in addition to their synthetic utility in the homogeneous and asymmetric catalytic reactions, the preparation of the crown ethers, cyclic and acyclic ethers, coordinated borates (boronic esters), pyridinyl-phosphine ligands, pyridinyl-phosphite ligands, and pyridinyl-phosphinite ligands is the other broad area of application of pyridinyl alcohols. In addition to the aforementioned applications they are used for modeling mode of action of enzymes and some therapeutic agents. Their strongly basic anionic nature gives them high ability to make bridges between metal centers rather than to bind to only one metal center in a terminal fashion in the synthesis of transition metal cluster complexes. Not least numbers of single molecule magnets that can be used as storage of high density information were the result of transition metal complexes of pyridinyl alcoholato ligands.

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