36720-94-2Relevant academic research and scientific papers
Ultrafast Excited-State Dynamics in trans-(N-Heterocyclic carbene)platinum(II) Acetylide Complexes
Valandro, Silvano R.,He, Ru,Bullock, James D.,Arman, Hadi,Schanze, Kirk S.
supporting information, p. 10065 - 10074 (2021/05/29)
This study probes femto- and picosecond excited-state dynamics of a series of N-heterocyclic carbene (NHC) ligand-containing platinum(II) complexes of the type trans-(NHC)2PtII(CC-Ar)2, where CC-Ar is an arylacetylide. By using femtosecond transient absor
Clickable azide-functionalized bromoarylaldehydes – synthesis and photophysical characterization
Friedrich, Marius,G?bel, Dominik,Lork, Enno,Nachtsheim, Boris J.
, p. 1683 - 1692 (2021/06/25)
Herein, we present a facile synthesis of three azide-functionalized fluorophores and their covalent attachment as triazoles in Huisgen-type cycloadditions with model alkynes. Besides two ortho- and para-bromo-substituted benzaldehydes, the azide functionalization of a fluorene-based structure will be presented. The copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) of the so-synthesized azide-functionalized bromocarbaldehydes with terminal alkynes, exhibiting different degrees of steric demand, was performed in high efficiency. Finally, we investigated the photophysical properties of the azide-functionalized arenes and their covalently linked triazole derivatives to gain deeper insight towards the effect of these covalent linkers on the emission behavior.
Understanding the limitations of NIR-to-visible photon upconversion in phthalocyanine-sensitized rubrene systems
?inkeviciute, Ugne,Javorskis, Tomas,Jozeliunaite, Augustina,Jur?enas, Saulius,Kazlauskas, Karolis,Orentas, Edvinas,Radiunas, Edvinas,Rai?ys, Steponas
supporting information, p. 5525 - 5534 (2020/05/13)
Low-power near-infrared (NIR)-to-visible (vis) photon upconversion (UC) systems are in demand for biomedical, photovoltaic and photocatalytic applications; however, the practical utilization is still hampered by low UC efficiency. Aiming to identify effic
Isoselective Lactide Ring Opening Polymerisation using [2]Rotaxane Catalysts
Lim, Jason Y. C.,Yuntawattana, Nattawut,Beer, Paul D.,Williams, Charlotte K.
, p. 6007 - 6011 (2019/04/03)
Polylactide (PLA) is a fully biodegradable and recyclable plastic, produced from a bio-derived monomer: it is a circular economy plastic. Its properties depend upon its stereochemistry and isotactic PLA shows superior thermal-mechanical performances. Here, a new means to control tacticity by exploiting rotaxane conformational dynamism is described. Dynamic achiral [2]rotaxanes can show high isoselectivity (Pi=0.8, 298 K) without requiring any chiral additives and enchain by a chain end control mechanism. The organocatalytic dynamic stereoselectivity is likely applicable to other small-molecule and polymerization catalyses.
Chiral 1,3-diaryl imidazolium salt carbene precursor, synthesis method thereof, metal salt compound and application
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Paragraph 0351; 0353; 0357-0359, (2019/06/07)
The invention discloses a chiral 1,3-diaryl imidazolium salt carbene precursor, a synthesis method thereof, a metal salt compound and application. The chiral 1,3-diaryl imidazolium salt carbene precursor forms a complex together with the copper to catalyz
Macrocyclic complexes of Pt(ii) and Rh(iii) with iso-tellurazole: N -oxides
Ho, Peter C.,Bui, Robert,Cevallos, Alberto,Sequeira, Shanel,Britten, James F.,Vargas-Baca, Ignacio
, p. 4879 - 4886 (2019/04/17)
Pt(ii) and Rh(iii) readily form complexes with 3-methyl-5-aryl-1,2-tellurazole 2-oxides (L = (3-Me-5-Ar-1,2-C3HTe(NO)). The aryl group is either phenyl or 3,5-di-tert-butylphenyl, the latter case being a new derivative with enhanced solubility. The compound [Pt(3-Me-5-(3,5-tBu2C6H3)-1,2-C3HTe(NO))4](BF4)2 crystallizes in the P21/C space group featuring a square planar complex in the lattice. The crystal of [RhCl2(3-Me-5-(C6H5)-1,2-C3HTe(NO))4](BF4) belongs to the I4 space group and contains an octahedral complex. In both instances, the iso-tellurazole N-oxide molecules are linked by Te?O chalcogen bonding interactions confirming an annular tetramer that binds the metal ion as a κ4Te macrocycle in a boat conformation. Low-frequency shifts of the 125Te magnetic resonance upon coordination and the observation of 125Te-195Pt and 125Te-103Rh 1J coupling constants indicate that the complexes are stable species in solution. The complex ions were also observed in the electrospray mass spectra.
Synthesis of pyrene-based planar conjugated polymers and the regioisomers by intramolecular cyclization
Zhu, Xiaoyan,Wu, Yonggang,Zhou, Lina,Wang, Yuan,Zhao, Hongchi,Gao, Baoxiang,Ba, Xinwu
, p. 431 - 440 (2015/04/22)
Several planar conjugated polymers and model compounds containing pyrene units are synthesized. The precursor polymers and model compounds are obtained through the Pd(0)-catalyzed Suzuki reaction, then the planar structure is formed through intramolecular
Soluble silver acetylide for the construction and structural conversion of all-alkynyl-stabilized high-nuclearity homoleptic silver clusters
Zhang, Rui,Hao, Xiang,Li, Xiumin,Zhou, Zhengyang,Sun, Junliang,Cao, Rui
, p. 2505 - 2513 (2015/05/20)
Silver acetylide complex [Ag(ArC≡C)]n (Ar = 3,5-di-tert-butylphenyl) with unprecedented high solubility in common organic solvents has been designed and synthesized. The high solubility is due to two bulky tert-butyl substituents on the phenyl
Synthesis of polycyclic aromatic hydrocarbon-based nanovehicles equipped with triptycene wheels
Jacquot De Rouville, Henri-Pierre,Garbage, Romain,Cook, Rita E.,Pujol, Adeline R.,Sirven, Agnes M.,Rapenne, Gwenael
experimental part, p. 3023 - 3031 (2012/04/23)
Two new nanovehicles that have extended aromatic platforms as the cargo zones have been obtained. Two strategies were considered for the formation of the perylene core from two naphthalene precursors. The first was based on a Scholl-type reaction involving an oxidant, and the second used a brominated derivative to perform a homocoupling reaction. The first strategy failed under diverse coupling conditions in the presence of several strong oxidants. Nevertheless, the use of CoF3 in trifluoroacetic acid triggered a dimerization reaction between two ester groups of one molecule and the naphthalene unit of another, thereby surprisingly yielding a ten-membered carbon macrocycle. The second strategy encountered a lack of reactivity of the substrate under several homocoupling conditions. The dimerization was not easily performed but Ullmann-type conditions ultimately gave the expected product. The low yield and low solubility of the product encouraged us to modify our initial design. The synthesis of a new chassis that incorporated additional tert-butyl groups improved the solubility of the molecules and also prevented overcyclization of the aromatic platform by blocking these positions. Some p-phenylene spacers were also intercalated between the iodine and perylene centers to increase the reactivity of the halide towards coupling reactions. Two new chassis were obtained by Scholl-type oxidative coupling using FeCl 3 as the oxidant. The introduction of four triptycene wheels allowed the formation of the two corresponding nanovehicles. Deux nouveaux nanovehicules ont ete obtenus avec une plateforme polyaromatique pouvant servir de zone de chargement. Deux strategies de synthese ont ete considerees pour la formation du noyau perylene a partir de deux precurseurs naphtaleniques. La premiere a fait intervenir une reaction de type Scholl mettant en jeu un oxydant, tandis que la seconde a mis en uvre un derive brome afin de realiser un homocouplage. La premiere strategie a echoue malgre de nombreuses conditions de couplage testees. Neanmoins, les conditions utilisant CoF3 dans l'acide trifluoroacetique ont abouti a une dimerisation entre deux fonctions esters d'une molecule et le noyau naphtalene d'une seconde, conduisant a la formation d'un macrocycle a 10 chaenons. La seconde strategie a egalement souffert d'un manque de reactivite du substrat lors de l'homocouplage. La dimerisation n'a pu s'effectuer facilement, mais les conditions de type Ullmann ont finalement permis d'aboutir au compose souhaite. Le faible rendement combine a la faible solubilite du produit de cette reaction nous ont conduits a corriger le design initial. La synthese d'un nouveau chassis a ete entreprise en incorporant des groupements tert-butyles supplementaires, afin d'ameliorer la solubilite des molecules mais aussi pour eviter de surcycliser le chassis polyaromatique en bloquant ces positions. Des espaceurs p-phenylene ont egalement ete intercales entre l'atome d'iode et le noyau perylene pour ameliorer la reactivite de l'halogenure vis-a-vis des reactions de couplage. Deux nouveaux chassis ont ainsi ete obtenus par couplage oxydant de type Scholl en utilisant FeCl3 comme oxydant. L'introduction de quatre roues triptycenes a permis d'obtenir les deux nanovehicules correspondants. En route! Two new molecular nanovehicles with a large dedicated cargo zone have been synthesized according to a modular strategy based on sequential double Knoevenagel and Diels-Alder reactions. Copyright
Synthesis of fluorine-containing molecular rotors and their assembly on gold nanoparticles
Thibeault, Dominic,Auger, Michele,Morin, Jean-Francois
experimental part, p. 3049 - 3067 (2010/08/07)
A series of eight rotors containing thiol groups for attachment to gold surfaces and fluorine atoms for solid-state 19F NMR spectroscopy have been prepared through linear, multistep synthesis. The common rotating part of the rotors (rotator), c
