Diethylenetriamine-functionalized reduced graphene oxide having more amino groups for methylene blue removal.

To obtain a high-performance amino-functionalized graphene, a new aminated graphene was prepared through a substitution reaction between chlorine-functionalized reduced graphene oxide and diethylenetriamine. The product exhibits high nitrogen content uniformly distributed in its sheets, with diethylenetriamine covalently attached to these sheets. The C-N bond in the product was certified by the Fourier transform infrared spectrum, which implies the successful attachment of diethylenetriamine to the graphene sheets.

synthesis of a BiO quantum dot decorated BiOCl heterojunction with superior photocatalytic capability for organic dye and antibiotic removal.

As a decoration method, coupling a photocatalyst with semiconductor quantum dots has been proven to be an efficient strategy for enhanced photocatalytic performance. Herein, a novel BiOCl nanosheet decorated with BiO quantum dots (QDs) was first synthesized by a facile one-step chemical deposition method at room temperature. The as-prepared materials were characterized by multiple means of analysis.

Self-supporting photocatalyst of 2D BiO anchored on carbon paper for degradation pollutants.

Two-dimensional vertically aligned BiO nanosheets over carbon paper (CP) were prepared an growth approach. BiO/CP exhibits a robust photocatalytic activity, as well as renewability and flexibility. With Rhodamine B and 2,4-dichlorophenol used as target pollutants, the rate constant of BiO/CP was 3.

Robust photocatalytic activity of two-dimensional h-BN/BiO heterostructure quantum sheets.

Herein, defect intrinsic hexagonal boron nitride (h-BN) quantum sheets (QS) and bismuth oxide (BiO) QS were prepared from bulk materials by ball milling and solvent stripping, respectively. The h-BN/BiO heterostructure was fabricated a facile self-assembly method. The structure and performance of samples were systematically characterized.

α-(Substituted-phenoxyacetoxy)-α-heterocyclylmethylphosphonates: synthesis, herbicidal activity, inhibition on pyruvate dehydrogenase complex (PDHc), and application as postemergent herbicide against broadleaf weeds.

Pyruvate dehydrogenase complex (PDHc) is the site of action of a new class of herbicides. On the basis of the previous work for O,O'-dimethyl α-(substituted-phenoxyacetoxy)alkylphosphonates (I), further synthetic modifications were made by introducing a fural and a thienyl group to structure I. A series of α-(substituted-phenoxyacetoxy)-α-heterocyclylmethylphosphonate derivatives (II) were synthesized as potential inhibitors of PDHc.

The asymmetric synthesis of chiral cyclic α-hydroxy phosphonates and quaternary cyclic α-hydroxy phosphonates.

A highly practical, catalytic enantioselective cyclic phosphite addition to aldehydes and ketones was developed. The reaction rate of the asymmetric hydrophosphonylation was significantly enhanced by the addition of silver carbonate. Particularly, significant improvement has been achieved on the asymmetric hydrophosphonylation of unactivated ketones, giving quaternary α-hydroxy phosphonates with excellent enantioselectivity (up to 99% ee).

(S)-2-[1-(4-Bromo-phen-yl)-1-hy-droxy-ethyl]-5,5-dimethyl-1,3,2-dioxaphos-phinane 2-oxide.

In the crystal structure of the title mol-ecule, C(13)H(18)BrO(4)P, the phospho-nate ring adopts a chair conformation. Mol-ecules are linked by an O-H⋯O hydrogen bond [O⋯O = 2.780 (3) Å] to form chains parallel to the c axis.

2-[(4-Chloro-phen-yl)(hy-droxy)meth-yl]-5,5-dimethyl-1,3,2-dioxaphosphinan-2-one.

In the title compound, C(12)H(16)ClO(4)P, the phospho-nate ring adopts a chair conformation. In the crystal, intermolecular O-H⋯O hydrogen bonds link the molecules into chains propagating along the b axis.

(S)-2-[(2,4-Dichloro-phen-yl)(hy-droxy)meth-yl]-5,5-dimethyl-1,3,2-dioxa-phosphinane 2-oxide.

In the title mol-ecule, C(12)H(15)Cl(2)O(4)P, the cyclic dioxaphosphinane ring adopts a chair conformation. In the crystal, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains propagating along the b axis.

Dichloridobis[(1S,1S',2R,2R')-(+)-1,1'-di-tert-butyl-2,2'-diphospho-lane-κP,P']ruthenium(II).

In the title compound, [RuCl(2)(C(16)H(32)P(2))(2)], the Ru(II) ion is situated on a twofold rotation axis, so the asymmetric unit contains one half-mol-ecule. The slightly distorted octa-hedral environment of the Ru center is formed by four P atoms [Ru-P = 2.4417 (6) and 2.