Platinum(II) terpyridine-based supramolecular polymer gels with induced chirality.

Metal-ligand binding plays a crucial role in regulating the photophysical properties of supramolecular gels. In this study, we designed 1-Pt complexes comprising a central benzene-1,3,5-tricarboxamide unit functionalized with three terpyridines, which can form supramolecular gels with Pt(II). The resulting supramolecular gel of 1-Pt exhibited strong orange emission, which was attributed to the metal-to-metal ligand charge transfer during gel formation.

In Situ Supramolecular Gel Formed by Cyclohexane Diamine with Aldehyde Derivative.

Low-molecular-weight gels have great potential for use in a variety of fields, including petrochemicals, healthcare, and tissue engineering. These supramolecular gels are frequently metastable, implying that their properties are kinetically controlled to some extent. Here, we report on the in situ supramolecular gel formation by mixing 1,3-cyclohexane diamine () and isocyanate derivative () without any catalysis at room temperature in various organic solvents.

Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property.

Two pyrene derivatives having the perylenediimide () or the alky chain () in the middle of molecules were synthesized. Co-assembled supramolecular gels were prepared at different molar ratios of 0.2, 0.

Self-Assembled Triphenylphosphonium-Conjugated Dicyanostilbene Nanoparticles and Their Fluorescence Probes for Reactive Oxygen Species.

We report self-assembled novel triphenylphosphonium-conjugated dicyanostilbene-based as selective fluorescence turn-on probes for ¹O₂ and ClO. Mono- or di-triphenylphosphonium-conjugated dicyanostilbene derivatives and formed spherical structures with diameters of ca. 27 and 56.

Fluorescent composite hydrogels of metal-organic frameworks and functionalized graphene oxide.

GO MOFs! Azobenzoic acid functionalized graphene (A-GO) can act as a structure-directing template that influences hydrogel formation together with metal-organic frameworks (MOFs). Zn(2+) MOFs of pyridine derivatives work as framework linkers between the A-GO sheets (MOF-A-GO, see figure). MOF-A-GO exhibits a strong fluorescence enhancement upon gel formation.

Functionalized monolayers on mesoporous silica and on titania nanoparticles for mercuric sensing.

Heterogeneous "naked-eye" colorimetric and spectrophotometric cation sensors were prepared by immobilization of an azobenzene-coupled receptor onto mesoporous silica (AR-SiO(2)) or titania nanoparticles (AR-TiO(2)) via sol-gel or hydrolysis reactions. The optical sensing ability of AR-SiO(2) was studied by addition of metal ions such as K(+), Ca(2+), Sr(2+), Co(2+), Cd(2+), Pb(2+), Zn(2+), Fe(3+), Cu(2+) and Hg(2+) ions (all as chlorides) in aqueous solution. Upon the addition of Hg(2+) ion in suspension, the AR-SiO(2) resulted in a color change from yellow to deep red.

Donor-set-induced coordination sphere and oxidation-state switching in the copper complexes of O2S2X (X = S, O and NH) macrocycles.

Reaction of the O(2)S(2)X-macrocycles (L(1), X = S; L(2), X = NH; and L(3), X = O) with Cu(ClO(4))(2) x 6 H(2)O affords 1:1 (M/L) square-pyramidal Cu(II) complexes when X = S and NH but yields a rare 1:2 sandwich-type tetrahedral Cu(I) complex when X = O; the X-ray structures of all three complexes are reported. Substitution of O for S or NH in the ligand structure thus results in a donor-set-induced II/I oxidation state change of the copper, and this is accompanied by a square-pyramidal to tetrahedral topological change in the solid state. Spectrophotometric titration data (including Job plots) indicate that similar behavior occurs in acetonitrile.

Reversible solid optical sensor based on acyclic-type receptor immobilized SBA-15 for the highly selective detection and separation of Hg(II) ion in aqueous media.

An acyclic receptor immobilized mesoporous silica (ARMS) was prepared by sol-gel reaction and its optical sensing ability was studied upon the addition of heavy metal ions in aqueous solution.