Water-soluble luminescent CdSe quantum dots surface-modified with 2-mercaptoethane sulfonate were synthesized for the selective determination of free cyanide in aqueous solution high sensitivity (detection limit 1.1 × 10−6 M), via analyte-induced changes their photoluminescence after photoactivation.

1,4-diiodotetrafluorobenzene (1,4-DITFB) is an excellent halogen bonding donor and used to assemble organic phosphorescent co-crystal with carbazole in which 1,4-DITFB expected act as a functional synthon, the cement link molecules by heavy atom perturber enhance phosphorescence of emitter spin–orbital coupling. The XRD reveals that stoichiometry (2 : 1) between occurs. An infinite chain constructed C–I⋯π π⋯π stacking edge two significant maintaining stability 1D chain. inter-chain includes...

The cocrystals were assembled with 1,4-diiodotetrafluorobenzene (1,4-DITFB) as the halogen bonding donor and polycyclic aromatic hydrocarbons (PAH), biphenyl (Bp), naphthalene (Nap), phenanthrene (Phe), π-type acceptors, corresponding to 3 (Bp-DITFB), 4 (Nap-DITFB) 5 (Phe-DITFB), respectively. single crystal X-ray diffraction analysis reveals that two-dimensional layer in or one-dimensional chain structures are formed by C–I⋯π bonds, occurs both above-the-carbon above-the-bond models of...

The perfluoroaryl⋯aryl interaction, the most important subset of π-hole⋯π bonding, refers to attractive stacking interaction between a perfluoroaryl group and an aryl group. In contrast aryl⋯aryl with same size, much stronger has its own characteristics applications. A brief history development was given first in this review, followed by overview state-of-the-art nature interaction. Much attention paid application both traditional research fields such as crystal engineering organic...

Three phosphorescent cocrystals were prepared by 1,4-diiodotetrafluorobenzene and fluorene (cocrystal 1) its heterocyclic analogues, dibenzofuran 2) dibenzothiophene 3), based on C–I···π halogen bonding, C–H···π, C–H···I, or C–H···F hydrogen bonding as well F···F S···S contacts. They characterized X-ray crystallography, infrared, Raman spectroscopy, differential scanning calorimetry thermogravimetric analysis. The calculated energies indicate that the synergistic double in cocrystal 3...

Two supramolecular cocrystals, 1, pyrene/1,4-diiodotetrafluorobenzene (1,4-DITFB), and 2, pyrene/1,2-diiodotetrafluorobenzene (1,2-DITFB), have been prepared characterized using X-ray diffraction analysis multiple spectroscopic methods. Several intermolecular interactions such as C–I⋯I–C, C–I⋯π, π–π C–H⋯F were observed in cocrystal 1 and/or which DITFB molecules act simultaneously an isolator to prevent the pyrene molecule from aggregating also a heavy atom effect agent induce...

A novel cocrystal was successfully constructed by 1,4-dibromotetrafluorobenzene (1,4-DBrTFB) and phenanthrene (Phe) based on C–Br⋯π halogen bonding, π–hole⋯π C–H⋯π, C–H⋯Br C–H⋯F hydrogen well characterized XRD powder XRD. The stoichiometry of Phe to 1,4-DBrTFB is 3 : 2. Due the introduction 1,4-DBrTFB, exists as two states in cocrystal. One isolated bonding between Phe; other delocalized π–π conjugation molecules. Interestingly, different are corresponding phosphorescent emissions: spanning...

Seven novel cocrystals of pyrene with halo-perfluorobenzenes (F, Cl, Br, I) were successfully prepared and well characterized by X-ray single-crystal diffraction. The stoichiometries to halo-perfluorobenzene all 1:1. similar sandwich structures comprise alternatively stacked via π-interactions which molecules are isolated from each other as expected instead the dimer in pure crystal. phosphorescence or delayed fluorescence was, therefore, lightened under heavy atom perturbation...

Abstract Chirality, with its intrinsic symmetry‐breaking feature, is frequently utilized in the creation of acentric crystalline functional materials that exhibit intriguing optoelectronic properties. On other hand, development chiral crystals from achiral molecules offers a solution bypasses need for enantiopure motifs, presenting promising alternative and thereby expanding possibilities self‐assembly toolkit. Nevertheless, rational design prefer spontaneous symmetry breaking during...

Co-crystals assembled from 1,4-diiodotetrafluorobenzene and bent 3-ring-N-heterocyclic hydrocarbons <italic>via</italic> C–I⋯N C–I⋯π halogen bonds emit green, orange-yellow orange phosphorescence.

From π-hole⋯π to σ-hole⋯π bonds between haloperfluorobenzenes and fluoranthene in luminescent cocrystals.

The spectroscopic methods UV-Vis absorption, FT-IR and 13C 19F NMR demonstrate that 1,2-diiodoperfluoroethane (DIPFE) 1,6-diiodoperfluorohexane (DIPFH) display strong halogen bonding with halide anions. A 1 : stoichiometry of DIPFE or DIPFH anion is confirmed, the constants molar extinction coefficients are obtained. With same halide, possesses greater than DIPFE. Furthermore, present in this article far those all complexes reported. Interestingly, spectrum indicates promotes a conversion...

On the basis of varying amplitude and patterns (19)F NMR chemical shift C6F5X (X = F, Cl, Br, I) in presence chloride anions, bonding models C6F5X·Cl(-) complexes were tentatively established, relevant binding constants obtained. Interaction also simulated using computational chemistry. The theoretical computations found to be highly consistent with results experiments. show that C6F5Br/C6F5I Cl(-) prone forming C-I/Br···Cl(-) σ-hole signal shifting higher fields, interaction strength...

The host cocrystal 1 with a soft-cavity-type structure unit has been assembled by 1,4-diiodotetrafluorobenzene and 4-phenylpyridine N-oxide (PPNO) molecules mainly using the robust C–I···–O–N+ halogen bond. results indicate that cavity capacity to envelope functional guests, Car, Nap, Phe, BhQ molecules, further form host–guest cocrystals 2–5 bonds, hydrogen other weak noncovalent interactions. supramolecular can be adjusted in size or shape certain degree bound guest molecule, reflecting...

By combining a halogen bonding donor of 1,4-diiodotetrafluorobenzene (1,4-DITFB) or 1,2-diiodotetrafluorobenzene (1,2-DITFB) with 4-benzoyloxy-2,2,6,6-tetramethyl-piperidine-1-oxy free radical (BTEMPO, 1), two novel cocrystals, BTEMPO·1,4-DITFB (2) and BTEMPO·2(1,2-DITFB) (3), featuring one-dimensional (1D) zigzag chain cyclic tetrameric structure, respectively, were constructed via bonding. Furthermore, by tuning the between BTEMPO donors, packing modes organic radicals in both 2 3 are...