Discrete versus Infinite Molecular Self-Assembly: Control in Crystalline Hydrogen-Bonded Assemblies Based on Resorcinol

Cocrystallization of 1,2-bis(4-pyridyl)ethane (4,4‘-bipyeth) with resorcinol (res), 4-chlororesorcinol (4-Cl-res), and 4,6-dichlororesorcinol (4,6-di-Cl-res) yields molecular solids (4,4‘-bipyeth)·(res) 1a, 2(4,4‘-bipyeth)·2(4-Cl-res) 1b, and 2(4,4‘-bipyeth)·2(4,6-di-Cl-res) 1c with components held together by O−H···N hydrogen bonds. In 1a the components form an infinite 1D polar array, whereas in 1b and 1c the components form 0D four-component complexes. Formation of the discrete assemblies is attributed to peripheral steric effects, which block the solid-state polymerization

Discrete versus Infinite Molecular Self-Assembly: Control in Crystalline Hydrogen-Bonded Assemblies Based on Resorcinol

Cocrystallization of 1,2-bis(4-pyridyl)ethane (4,4‘-bipyeth) with resorcinol (res), 4-chlororesorcinol (4-Cl-res), and 4,6-dichlororesorcinol (4,6-di-Cl-res) yields molecular solids (4,4‘-bipyeth)·(res) 1a, 2(4,4‘-bipyeth)·2(4-Cl-res) 1b, and 2(4,4‘-bipyeth)·2(4,6-di-Cl-res) 1c with components held together by O−H···N hydrogen bonds. In 1a the components form an infinite 1D polar array, whereas in 1b and 1c the components form 0D four-component complexes. Formation of the discrete assemblies is attributed to peripheral steric effects, which block the solid-state polymerization

Design and Construction of a 2D Metal Organic Framework with Multiple Cavities: A Nonregular Net with a Paracyclophane that Codes for Multiply Fused Nodes

A metal organic framework with two different nodes (circle and square) and a structure related to one of the 20 known 2-uniform nets has been constructed using an organic building unit that codes for multiply fused nodes

Group III quinaldates: synthesis, structure and photoluminescence

<p>The reactions of Al(III), Ga(III) and In(III) nitrates with 2-quinaldic acid (qaH) afforded [Al₂(OH)₂(qa)₄]·2H₂O (<b>1</b>), [Ga(qa)₂(H₂O)₂]NO₃ (<b>2</b>) and [In(qa)₂(NO₃)(H₂O)] (<b>3</b>), respectively, in high yields. The crystal structures of <b>1</b>, <b>2</b> and <b>3</b> have been determined by single-crystal X-ray crystallography. The structure of <b>1</b> features a di-hydroxo bridged [Al₂(μ-OH)₂]⁴⁺ dimer in which each Al(III) is further ligated by two bidentate chelate qa⁻ ligands. Complexes <b>2</b> and <b>3</b> are mononuclear with the M(III) ions in octahedral environments surrounded by two bidentate chelate qa⁻ and two H₂O in <b>2</b> or one H₂O and a terminal NO₃⁻ in <b>3</b>. Characteristic IR as well as thermal analysis and solid-state fluorescence are discussed.</p

Design and Construction of a 2D Metal Organic Framework with Multiple Cavities: A Nonregular Net with a Paracyclophane that Codes for Multiply Fused Nodes

A metal organic framework with two different nodes (circle and square) and a structure related to one of the 20 known 2-uniform nets has been constructed using an organic building unit that codes for multiply fused nodes

A Polyhedral Host Constructed Using a Linear Template

A linear template is used to direct the synthesis of a “head-to-head” tetrapyridine in the solid state, which, in a second step, assembles with a transition-metal-ion to form a polyhedral metal-organic host with a structure that conforms to a trigonal antiprism. The application of the linear template is reminiscent of the synthetic strategy of nature

A Polyhedral Host Constructed Using a Linear Template

A linear template is used to direct the synthesis of a “head-to-head” tetrapyridine in the solid state, which, in a second step, assembles with a transition-metal-ion to form a polyhedral metal-organic host with a structure that conforms to a trigonal antiprism. The application of the linear template is reminiscent of the synthetic strategy of nature

Coordination-Driven Self-Assembly Directs a Single-Crystal-to-Single-Crystal Transformation that Exhibits Photocontrolled Fluorescence

Coordination-driven self-assembly is employed to direct a single-crystal-to-single-crystal [2 + 2] photodimerization that exhibits tunable fluorescence

Coordination-Driven Self-Assembly Directs a Single-Crystal-to-Single-Crystal Transformation that Exhibits Photocontrolled Fluorescence

Coordination-driven self-assembly is employed to direct a single-crystal-to-single-crystal [2 + 2] photodimerization that exhibits tunable fluorescence

Toward a Reactant Library in Template-Directed Solid-State Organic Synthesis: Reactivity Involving a Monofunctional Reactant Based on a Stilbazole

Cocrystallization of 4-chlorostilbazole (4-Cl-sbz) with either resorcinol (res) or 4-ethylresorcinol (4-Et-res) yields three-component molecular assemblies, (res)·2(4-Cl-sbz) and (4-Et-res)·2(4-Cl-sbz), held together by two O−H···N hydrogen bonds. The olefins of each assembly conform to the distance criterion of Schmidt for [2+2] photoreaction. In the former, the olefins lie antiparallel, whereas in the latter, the olefins lie parallel. Both solids are photoactive, leading to the regiocontrolled solid-state synthesis of rctt-1,2-bis(4-pyridyl)-3,4-bis(4-chlorophenyl)cyclobutane (4-Cl-dpcb) in near or quantitative yield. The photoactivity of (res)·2(4-Cl-sbz) is attributed to the reactant undergoing a pedal-like change in conformation prior to cyclobutane formation. The ability to change the diol to achieve olefin alignment is expected to provide additional synthetic flexibility to this template approach