Organic fluorescent nanoparticles, excitation-dependent photoluminescence, hydrogen-bonded clusters and lysobisphosphatidic acid are four interesting individual topics in materials biological sciences. They have attracted much attention not only because of their unique properties important applications, but also the nature intriguing phenomena remained unclear. Here we report a new type organic nanoparticles with intense blue visible fluorescence range 410–620 nm. The composed ten...

Liquid crystalline 1-acetamido-3-alkylimidazolium bromide, hexafluorophosphate and tetrafluoroborate salts with 3-alkyl chains of carbon number n = 10, 12, 14, 16 18 were prepared. The single crystal structure the PF6− salt 12 self-organizes to form a framework hydrogen bonded ribbon polymer. mesomorphic behaviors these compounds studied by polarized optical microscopy, differential scanning calorimetry powder X-ray diffraction. presence extended bonding interactions in acetamidoimidazolium...

Carboxylic acid functionalized imidazolium salts, their deprotonated carboxylate zwitterions and acid-zwitterion adducts have been studied, are denoted as [N-Cn,N′-CO2H-Im][X] (Cn = CnH2n+1; X Cl−, Br−, BF4− PF6−), [N-Cn,N′-CO2-Im] [(N-Cn,N′-CO2-Im)2H][anion] (anion NO3− Br−), respectively. Crystal structures of [N-C10,N′-CO2-Im]Br [N-Cn,N′-CO2-Im]·2H2O studied by single-crystal X-ray diffraction indicate that carboxylic groups provide rich C–H⋯Br and/or C–H⋯O hydrogen bonding interactions...

Acyclic acetamide functionalized mercury or silver carbene complexes, in which the coordination sphere adopts a skewed core conformation, self-assembled to form rectangular architectures.

The factors influencing the formation, organizations, and temperature ranges of smectic phases a structurally diverse family phosphonium salts have been examined. consist one short group three long n-alkyl chains attached to positively charged phosphorus atom either free or covalently counterion, latter resulting in zwitterionic salts. Of 61 investigated, which 37 not synthesized previously, most pack lamellae within their solid phases. Single-crystal X-ray structures two...

We investigated the self-assembly behaviors of supramolecules formed by poly(4-vinylpyridine) (P4VP) and a fanlike small molecule, 3,4,5-tris(hexadecyloxy)benzoic acid (THBA), via hydrogen bonding interactions. Different from other commonly studied molecules, THBA bears three particularly long hydrophobic tails tends to form stable crystals itself, which gives rise unusual phase structures. used FTIR investigate degree complexation find that it is not monotonically increased plateau with...

A novel triple helical structure that is self-assembled by cationic molecules, 1-acetamido-3-(2-pyrazinyl)-imidazolium, reported. The computational analysis underpins the formation of helix driven C–H?O hydrogen bonding.

An efficient one-pot synthesis of oxazolidinones was developed through CuI/DBU/MS joint system-catalyzed carboxylative cyclization arylacetylene, arylaldehyde, and arylamine in water medium under a 1 atm carbon dioxide (CO2) atmosphere. The 4 Å molecular sieves (MSs) were added to improve CO2 capture facilitate carboxylation give the products high yields. system is robust highly effective for reactions with different substrates, some target obtained an excellent yield ∼96%, no side final step.

A series of 1-carbamoylmethyl-3-ethoxycarbonylmethylpyridinium salts with different anions (PF6− (1), BF4− (2), OTf− (3) and Br− (4)) have been synthesized characterized by single-crystal X-ray diffraction. The L-shaped pyridinium cation moieties provide rich C–H donors serve as building blocks to form grid structures PF6− BF4−, a zig-zag stair structure bilayer anions.

The synthesis and characterization of tetranuclear silver triazole metallomesogens, [Ag4(L(4)-C(n))6][BF4]4 (L(4)-C(n) = 4-alkyl-1,2,4-triazoles where C(n) stands for C(n)H(2n+1) with n 12, 14, 16, 18), are reported. Upon heating, a phase transition sequence Cr → SmC Cub SmA isotropic liquid is observed all these compounds. Depending on the alkyl chain length, two types cubic phases found in this series Those shorter chains (n 12 14) exhibit micellar phase, whereas long =16 18) show...

Two series of nicotinamide based ionic liquid crystalline compounds, 3-carbamoyl-1-alkylpyridin-1-ium salts ([Nia–Cn]2X, X = CuCl42− and ZnCl42−; n 12, 14 16), have been synthesized characterized by single crystal powder X-ray diffraction, DSC POM. Both form interdigitated bilayers in the solid state phase. The layers two are stabilized mainly four N–H⋯Cl six C–H⋯Cl hydrogen bonds per anion has sacrificed formation strong N–H⋯OC bonding state. However, dominate mesophase at high temperature...

A series of 1-acetamido-3-(2-pyrimidyl)-imidazolium salts with different anions (Br− (1), NO3− (2), PF6− (3) and BF4− (4)) have been synthesized characterized using single crystal X-ray diffraction. The crescent imidazolium moieties provide rich C–H donors serve as building blocks to either convergently form helical tubes Br− NO3−, or divergently 1-D catemers anions.

A series of N,N′-dihexylbenzimidazolium salts with three anions, Br−, I− and PF6−, have been synthesized characterized by single-crystal X-ray diffraction. These exhibit some anion-independent structural properties, which include the U-shaped conformation, interdigitated bilayer packing thickness ionic layer. also show anion-controlled inter-headgroup interactions; benzimidazolium headgroups form a dimer motif via π–π interaction when anions are Br− I−, however, 1D catemer is formed C–H⋯π...

A series of 1-(2-amino-2-oxoethyl)-3-carbamoylpyridin-1-ium salts with different anions (Cl−, Br−, BF4−, NO3−, OTf−, PF6− and BPh4−) have been synthesized characterized by single crystal X-ray diffraction. The results demonstrate that the L-shaped diamide pyridinium cations can aggregate convergently to form a tubular structure or divergently one-dimensional ribbon two-dimensional brick, grid sheet structures via hydrogen bonding catemer motifs, including conventional N–H⋯O type (BPh4− (7)),...

We report a new type of fluorescent organic nanoparticles (16-EDFONP) which are composed ten bis(3,4,5-tris(16-alkyloxy) monobenzoylglyceride) bisphenol A molecules. The only found in high concentration solution and exhibit the excitation-dependent fluorescence (EDF). 16-EDFONP shows clear spectral relaxation on nanosecond time scale. have observed similar shifts cyclohexane, thus attribute time-dependent Stokes shift to emission from multiple conformations 16-EDFONP. With employment steady...

A series of 1-(2-amino-2-oxoethyl)-4-carbamoylpyridin-1-ium salts with different anions (PF6− (1), OTf− (2), BPh4− (3) and Br− (4)) have been synthesized characterized by single crystal X-ray diffraction. The results demonstrate that the unparallel diamide-substituted pyridinium form a dimerized rectangular building block 2-D structure via N–H⋯O C–H⋯O hydrogen bonding (1) respectively), sheet (BPh4− (3)) catemers plate (Br− (4)). effects on motifs, blocks structures four anion species...

A series of 3-carbamoyl-1-(10-carboxydecyl)pyridin-1-ium salts with four anions (PF6− (1), BF4− (2), NO3− (3), and Br− (4)) have been synthesized characterized by single-crystal X-ray diffraction. All a primary L-shaped cation conformation, each pair cations forms similar well-defined rectangular motif nicotinamide fatty acid groups via N–H⋯O or C–H⋯O hydrogen bonding. The effects on hydrogen-bonding motifs, building blocks structures the anion species different acceptor abilities, sizes...

Nonconjugated polymers have been synthesized from maleic anhydride, poly(ethylene glycol), and bisphenol-diglycidyl ether without utilizing any solvent. The polymeric thin films produced by the nonconjugated were spin-coated on ITO coated glass Si substrates. Self-assembly nanoparticles (1.6-6.2 nm) are observed. It is proposed that nanoparticle constructed through a self-assembly process with bisphenol-A aggregates glycol) moieties. photoluminescence spectrum of film peaks at near 450 nm...

anhydride-poly(ethylene glycol) co-polymer (A-PEGCP) has been synthesized from maleic anhydride, poly(ethylene and bisphenol-A diglycidyl ether without using any organic solvent. The thin films produced A-PEGCP solution were spin-coated on ITO-coated glass. nanoparticles are observed in the films. It is proposed that nanoparticle built by a self-assembly process with aggregates poly (ethylene moieties. effects of concentration, thermal annealing, excitation wavelength moisture optical...

In this paper, it is reported that a metal-free and non-conjugated polymer, MA-PEG 8000-BADGE (MP8B), exhibits an antireflective property substrate-dependent photoluminescence (SDP). MP8B was constructed from maleic anhydride, poly(ethylene glycol) bisphenol-A diglycidyl ether. Self-assembled nanoparticles are found in can prospectively act as scattering centers to improve light trapping extraction. films prepared solutions have been characterized by (PL), atomic force microscopy (AFM),...

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It is shown in this paper that a polymer, MA-PEG 1000-DGEBA (MP1D), exhibits antireflection, substrate-dependent photoluminescence (SDP), wide band-gap, and photoconduction characterization. MP1D was synthesized from maleic anhydride, polyethylene glycol 1000, bisphenol-A diglycidyl ether. Self-assembled nanoparticles embedded film ranging 2.5 to 31.6 nm are observed, which could be expected as scatterers enhance light trapping extraction. The size of the nanoparticle increases with...

A series of (µ-alkoxo)diiron(III) complexes [Fe2(L)Cl4]Cl·2H2O 1, [Fe2(L)(NCS)n(Cl)4–n]Cl· 4H2O 2–5 (n = 1–4) and [Fe2(L)(N3)n(Cl)4–n] NO3·3H2O 6–9 1–4), where HL is N,N,N′,N′-tetrakis(2-benzimidazolylmethyl)-2-hydroxy-1,3-diaminopropane, have been synthesized their structures, magnetic redox properties Mössbauer spectra investigated. Three 3 9 were characterized by single crystal structure analysis. The structures 1 are geometrically symmetric, but asymmetric. all typical high-spin...