Disodium 4,4′-oxydibenzoate

The crystal structure of the title compound, 2Na+·C14H8O5 2−, consists of alternating layers of sodium cations and 4,4′-oxydibenzoate anions; the layers are perpendicular to the a axis, with the distance between the layers of cations (or anions) being half this axial length. The Na atoms are disordered over three sites [occupancies 0.775 (4), 0.781 (6) 0.444 (6)]

Tetra-n-propyl­ammonium acetate–boric acid (1/1)

In the crystal structure of the ammonium carboxyl­ate–boric acid cocrystal, (C3H7)4N+·CH3CO2 −·H3BO3, the boric acid forms two O—H⋯O hydrogen bonds to the acetate anion. The acetate–boric acid species is hydrogen bonded to another acetate–boric acid species through the third OH unit of the boric acid about a twofold rotation axis

Bis(tetra­methyl­ammonium) oxalate monohydrate

In the crystal structure of the title hydrated salt, 2C4H12N+·C2O4 2−·H2O, the two independent cations, the anion and the water mol­ecule all lie on special positions of m site symmetry. In both cations, the mirror plane passes through the nitrogen atom and two methyl groups; in the anion, the mirror plane passes through two carbon and two oxygen atoms. The anions and water mol­ecules inter­act by O—H⋯O hydrogen bonding, forming a chain running along the b axis

Tris(tetra­ethyl­ammonium) hydrogen bis­[2-(sulfatosulfan­yl)benzoate]

The reaction between tetra­ethyl­ammonium hydroxide and 2,2′-dithio­benzoic acid yields the title compound, 3C8H20N·H(C6H4O5S2)2 3−, the trianion of which comprises two 2-(sulfato­sulfan­yl)benzoate dianions linked across a center of inversion by an acid H atom. One of the cations is disordered about another center of inversion

4-(4-Hydroxybenzoyl)phenol mono­hydrate

The aromatic rings of the title compound, C13H10O3·H2O, are aligned at dihedral angles of 20.6 (1) and 40.8 (1)° with respect to the triangular Car­yl–C(=O)–Car­yl fragment. The hy­droxy groups are each hydrogen-bond donors to separate water mol­ecules, the water mol­ecule itself being hydrogen-bonded to one hy­droxy group and one carbonyl group. The water mol­ecule exists in an unusual four-coordinate environment in the resulting layer structure

Hollow spherical SiO2 micro-container encapsulation of LiCl for high-performance simultaneous heat reallocation and seawater desalination

Energy & fresh water have both become scarce resources in the modern era of human society. Sorption-based technology is environmentally friendly and energy-efficient and can be driven by low-grade energy to transfer energy and produce fresh water. Here, we report a solid sorbent fabricated by encapsulating a hygroscopic salt, lithium chloride (LiCl), inside micro-sized hollow-structured SiO2. This composite sorbent (LiCl@HS) exhibits 6 times faster water vapor sorption kinetics than pure LiCl and a water vapor sorption capacity of 1.7 kg kg-1 at a relative humidity (RH) of 50%, which is the highest ever reported for any solid sorbent in the literature. The low regeneration temperature (<80 °C) and good cycling stability ensure the feasibility of the composite sorbent for use in practical applications. The thermodynamic calculations reveal that the sorbent is able to continuously supply 20 °C temperature lift with a maximum coefficient of performance (COP) for cooling of 0.97 and COP for heating of 1.89 while simultaneously producing 9.05 kg potable water per kilogram sorbent daily using seawater as the source water and solar energy as the sole energy source. A homemade system is developed and its practical performance in providing seasonally switchable heating and cooling along with clean water production from source water with an impaired quality is successfully verified, indicating its great potential

Bis(μ2-3,5-diisopropyl-4H-1,2,4-triazole-κ2 N 1:N 2)bis­[(nitrato-κO)silver(I)]

The neutral N-heterocycle in the title centrosymmetric dinuclear compound, [Ag2(NO3)2(C8H15N3)2], bridges two metal atoms through its imino N atoms. The N—Ag—N skeleton is bent [N—Ag—N = 127.2 (3)°]; as one of two O atoms of the nitrate anion is nearly coplanar with this N—Ag—N skeleton [Ag—O = 2.63 (1) Å], the coordination geometry around the AgI atom is regarded as trigonal-planar. One of the two isopropyl groups is disordered over two positions in respect of the methyl groups in a 1:1 ratio. In the crystal structure, inter­molecular N—H⋯O hydrogen bonding is observed between the nitrate groups and triazole ligands

Recent progress in Hamiltonian light-front QCD

Hamiltonian light-front quantum field theory constitutes a framework for the non-perturbative solution of invariant masses and correlated parton amplitudes of self-bound systems. By choosing light-front gauge and adopting a basis function representation, we obtain a large, sparse, Hamiltonian matrix for mass eigenstates of gauge theories that is solvable by adapting the ab initio no-core methods of nuclear many-body theory. Full covariance is recovered in the continuum limit, the infinite matrix limit. We outline our approach and discuss the computational challenges.Comment: Invited paper at Light Cone 2008, Mulhouse, Franc

How is Business Adapting to Climate Change Impacts Appropriately? Insight from the Commercial Port Sector

Adaptation to climate change impacts is a key research topic in business ethics that poses substantial implications on the good lives of human beings. The commercial port sector is a highly relevant study focus with its pivotal roles in supply chains and international trade. Hence, it is important to investigate whether the port planning system and practice is appropriate in tackling climate change impacts. But beforehand, we must thoroughly understand the attitude and behaviors of port planners and operators on ports’ climate adaptation planning. Through a survey towards 21 ports (seaports and dry ports) in Canada, the paper investigates the attitude and behaviors of port planners and operators on ports’ climate adaptation planning. Towards the end, we propose a new approach so as to enable port stakeholders to carry out climate adaptation planning effectively. The paper offers important insight to researchers to investigate the ways in developing effective climate adaptation plans and practice for ports and other business sectors. © 2016 Springer Science+Business Media Dordrech