41225-63-2

Upstream product

• 3978-81-2 4-tert-butylpyridine 
• 23569-17-7 4-tert-butylpyridine N-oxide 
• 1122-62-9 2-acetylpyridine 
• 75-98-9 Trimethylacetic acid 
• 127-17-3 2-oxo-propionic acid 
• 917-64-6 methyl magnesium iodide 
• 42205-73-2 4-tert-butyl-2-cyanopyridine 

Downstream Products

• 1374792-29-6 C₅₆H₆₀N₆ 
• 1374792-35-4 C₅₆H₅₈Br₂N₆ 
• 1374792-36-5 C₅₈H₅₈N₈ 
• 1374792-37-6 C₈₀H₁₀₈N₆O₂ 

Relevant academic research and scientific papers

Steric control of directional isomerism in dicopper(I) helicates of asymmetrically substituted 2,2':6',2':2,6'-quaterpyridine derivatives

Derivatives of 2,2':6',2'':2'',6'''-quaterpyridine have been prepared which are asymmetrically substituted with alkyl groups in the 4- or 6- position and with various substituents in the 4'-position. These ligands form dicopper(I) double helicates which have been investigated by 1H and 13C NMR spectroscopic techniques. The formation of helical isomers is shown to depend on the intramolecular interactions between the constituent helicands of the double helicate; 4'-methyl substituents undergo steric interactions with the 4-substituent of the partner helicand, leading to a modest selectivity, although bulky 4-substituents decrease selectivity. In the absence of 4'-substituents, the smaller pitch permits steric interactions between like 4-substituents of the component helicands. In each case, formation of the head-to-head helicate isomer is preferred.

Heteroleptic ruthenium bis-terpyridine complexes bearing a 4-(dimethylamino)phenyl donor and free coordination sites for hydrogen photo-evolution

Motivated by the recent report of a heteroleptic ruthenium bis-terpyridine complex [Ru(toltpy)(bipytpy)](PF6)2 (toltpy: 4′-(tolyl)-2,2′:6′,2′′-terpyridine; bipytpy: 4′-(4-bromophenyl)-4,4′′′:4′′,4′′′′-di-pyridinyl-2,2′:6′,2′′-terpyri

Sterically congested, hexameric tetrakispyridinyl-PdII/Cd II-metallomacrocycles: Self-assembly and structural characterization

Hexagonal PdII- or CdII-tetrakispyridinyl-based macrocycles are quantitatively self-assembled from 4′-(3-pyridinyl)-4, 4′′-di(tert-butyl)-2,2′:6′,2″-terpyridine and structurally confirmed by NMR and TWIM-MS. The Royal Society of Chemistry 2011.

Macrocyclic versus acyclic preorganization in organoplatinum(II)-based host?guest complexes

Two host-guest systems have been constructed, by employing structurally similar terpyridine platinum(II) macrocycle and molecular tweezer as the synthetic receptors. The macrocycle/guest complex displays low-energy emission signal, reinforced non-covalent binding affinity, and enhanced photosensitization capability than those of the molecular tweezer/guest one. The discrepancy between macrocyclic and acyclic preorganization modes originates from the different numbers of Pt(II)[tbnd]Pt(II) metal–metal bonds in host-guest complexation structures.

Self-assembly of giant supramolecular cubes with terpyridine ligands as vertices and metals on edges

Self-assembly of three-dimensional (3-D) architecture using terpyridine (tpy)-based building blocks is challenging and seldom addressed due the fixed geometry (around 180°) of tpy-M(ii)-tpy (M = Ru, Fe, Zn, and Cd) connectivity. Here we describe the self-

From trigonal bipyramidal to platonic solids: Self-assembly and self-sorting study of terpyridine-based 3d architectures

Using a series of tritopic 2,2':6',2'-terpyridine (tpy) ligands constructed on adamantane, three discrete 3D metallo-supramolecular architectures were assembled, i.e., trigonal bipyramidal, tetrahedron, and cube. The self-assembly used tritopic ligands as

Urea-functionalized M4L6 cage receptors: Anion-templated self-assembly and selective guest exchange in aqueous solutions

We present an extensive study of a novel class of de novo designed tetrahedral M4L6 (M = Ni, Zn) cage receptors, wherein internal decoration of the cage cavities with urea anion-binding groups, via functionalization of the organic components L, led to selective encapsulation of tetrahedral oxoanions EO4n- (E = S, Se, Cr, Mo, W, n = 2; E = P, n = 3) from aqueous solutions, based on shape, size, and charge recognition. External functionalization with tBu groups led to enhanced solubility of the cages in aqueous methanol solutions, thereby allowing for their thorough characterization by multinuclear (1H, 13C, 77Se) and diffusion NMR spectroscopies. Additional experimental characterization by electrospray ionization mass spectrometry, UV-vis spectroscopy, and single-crystal X-ray diffraction, as well as theoretical calculations, led to a detailed understanding of the cage structures, self-assembly, and anion encapsulation. We found that the cage self-assembly is templated by EO4n- oxoanions (n ≥ 2), and upon removal of the templating anion the tetrahedral M4L6 cages rearrange into different coordination assemblies. The exchange selectivity among EO4n- oxoanions has been investigated with 77Se NMR spectroscopy using 77SeO42- as an anionic probe, which found the following selectivity trend: PO 43- ? CrO42- > SO 42- > SeO42- > MoO 42- > WO42-. In addition to the complementarity and flexibility of the cage receptor, a combination of factors have been found to contribute to the observed anion selectivity, including the anions' charge, size, hydration, basicity, and hydrogen-bond acceptor abilities.

Synthesis and photophysical studies of back-to-back dinuclear platinum terpyridine complexes with different substituents on the bridging ligand

Four back-to-back dinuclear platinum terpyridine complexes with different substituents on the bridging ligand (1a-1d) were synthesized and characterized. Their electronic absorption, photoluminescence and triplet transient difference absorption were systematically investigated. All complexes exhibit strong 1MLCT/1ILCT absorption bands in the visible region, which significantly red-shifts when electron-donating substituents are introduced on the conjugated bridge and blue-shifts when electron-withdrawing substituents are present. Excitation of 1a and 1d in solution at their respective low-energy absorption band at room temperature results in an orange and red luminescence, respectively, which can be tentatively attributed to the 1MLCT/ 1ILCT excited state. These complexes exhibit intense broad triplet transient difference absorption in the visible to the near-IR region, which likely arises from the ligand-localized states (3π,π* or 3ILCT). Electron-donating substituent causes a pronounced red-shift, while electron-withdrawing substituents induce a blue-shift of the triplet transient absorption bands.

The energetics and mechanism of fluxionality of 2,2′:6′,2″-terpyridine derivatives when acting as bidentate ligands in transition-metal complexes. A detailed dynamic NMR study

Syntheses are reported for the following transition metal complexes of derivatives of 2,2′:6′,2″-terpyridine, [ReBr(CO)3L] (L = mcpt, mcpmt, mmtt or bmtt), [PtIMe3(mcpt)], [Pd(C6F5)2(mcpt)] and [Pt(C6F5)2(mcpt)] where mcpt = 4-methyl-4′-(4-chlorophenyl)-2,2′:6′,2″-terpyridine, mcpmt = 4-methyl-4′-(4-chlorophenyl)-4″-methyl-2,2′:6′,2″- terpyridine, mmtt = 4-methyl-4′-methylthio-2,2′:6′,2″-terpyridine and bmtt = 4-tert-butyl-4′-methylthio-2,2′:6′,2″-terpyridine. In organic solvents (CD2Cl2, CDCl2·CDCl2) they exist as bidentate chelate complexes which undergo double 1,4-metallotropic shifts ('tick-lock' twists). These shifts have been monitored by variable temperature one- and two-dimensional NMR methods and activation energy data obtained. These energy data are very metal-dependent, magnitudes of ΔG? (298.15 K) being in the range 66-101 kJ mol-1 and showing the trend PtII ? PdII ≈ ReI > PtIV. The nature of the ligand does not greatly influence the ligand fluxionality but does affect the relative populations of the pairs of metal complexes found in solution (when L = mcpt, mmtt and bmtt). Above-ambient temperature 2-D-exchange spectroscopy (EXSY) NMR experiments provide firm evidence for the fluxions occurring by an associative mechanism, involving five-co-ordinate intermediates for palladium(II) and platinum(II) complexes, and seven-co-ordinate intermediates for platinum(IV) and, by analogy, rhenium(I) complexes.