Sucrose-associated SnRK1a1-mediated phosphorylation of Opaque2 modulates endosperm filling in maize.

During maize endosperm filling, sucrose not only serves as a source of carbon skeletons for storage-reserve synthesis but also acts as a stimulus to promote this process. However, the molecular mechanisms underlying sucrose and endosperm filling are poorly understood. In this study, we found that sucrose promotes the expression of endosperm-filling hub gene Opaque2 (O2), coordinating with storage-reserve accumulation.

A mechanism for two-step thermal decomposition of 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105).

2,6-Diamino-3,5-dinitropyrazine-1-oxide (LLM-105) is a representative of the new generation of low-sensitivity energetic materials and has been applied extensively in formulations as an insensitive high-energetic ingredient. Although the initial thermal decomposition mechanism of LLM-105 has been studied based on quantum chemical calculations, the internal mechanism of the two-step thermal decomposition still lacks experimental research. Thus, this study involves a detailed experimental study to reveal the mechanism of the two-step thermal decomposition of LLM-105.

Kinetics and mechanism of decomposition induced by solvent evolution in ICM-101 solvates: solvent-evolution-induced low-temperature decomposition.

[2,2'-Bi(1,3,4-oxadiazole)]-5,5'-dinitramide (ICM-101), a high-energy-density material, was reported in recent years. ICM-101 is the first energetic material with the 2,2'-bi(1,3,4-oxadiazole) structure as the main ring structure. The molecular structure of ICM-101 shows excellent planar characteristics, providing a new option for the design of high-energy-density materials.

5-Amino-1H-1,2,4-triazole-3-carbohydrazide and its applications in the synthesis of energetic salts: a new strategy for constructing the nitrogen-rich cation based on the energetic moiety combination.

Nitrogen-rich cation 5-amino-1H-1,2,4-triazole-3-carbohydrazide and its derivatives were synthesized by a new molecular design strategy based on the energetic moiety combination. All derivatives were fully characterized by vibrational spectroscopy (IR), multinuclear (1H, 13C) NMR spectroscopy, elemental analysis, differential scanning calorimetry (DSC), and impact and friction-sensitivity tests. The structures of compounds 1-4, 7 and 8 were further confirmed by single-crystal X-ray diffraction and six different types of crystal packing were surprisingly discovered.

Correction: Synthesis, and single crystal structure of fully-substituted polynitrobenzene derivatives for high-energy materials.

[This corrects the article DOI: 10.1039/C7RA13346D.].

Synthesis, and single crystal structure of fully-substituted polynitrobenzene derivatives for high-energy materials.

New energetic fully-substituted polynitrobenzene derivatives were synthesized the reaction of 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB) with 1,2,4-triazole followed by the nucleophilic substitution of the halo groups by aqueous ammonia or sodium azide. These compounds were charactered by H NMR, C NMR and HRMS. Additionally, the structures of amino derivatives 6, 8 and azido derivative 7 were further confirmed by single crystal X-ray diffraction analysis.

Energetic π-conjugated vinyl bridged triazoles: a thermally stable and insensitive heterocyclic cation.

A new family of vinyl bridge 1,1'-(ethane-5-yl)-bis(3,4-diamino-1,2,4-triazolium) salts were explored as novel structural energetic materials. These new salts were further characterized by elemental analysis, infrared and multinuclear NMR spectra. Structural confirmation of nine salts such as 4-11 and 14 was supported by single-crystal X-ray diffraction.

Thermally Stable Energetic Salts Composed of Heterocyclic Anions and Cations Based on 3,6,7-Triamino-7 H-s-triazolo[5,1-c]-s-triazole: Synthesis and Intermolecular Interaction Study.

To create intermolecular N-H⋅⋅⋅O and N-H⋅⋅⋅N hydrogen-bond (HB) interactions, a series of energetic N-heterocyclic anions including polynitro- and multi-nitrogen anions were introduced into the 3,6,7-triamino-7 H-s-triazolo[5,1-c]-s-triazole (TATT) cation to get numerous novel energetic salts. Single-crystal X-ray diffraction was employed to confirm the crystal structure and crystal packing properties of compounds 2⋅H O, 6, and 9. Additionally, Hirshfeld surface analysis and atoms-in-molecules topology analysis provided insights into the intermolecular hydrogen-bond interaction of these new salts.