RESUMO
Controlling the optical activity of halide perovskite materials through modulation of the coordination configurations of the metal ions is important. Herein, a novel manganese-based halide, specifically diaquatetrakis(methyldiphenylphosphine oxide)manganese(II) tetrachloridomanganate(II), [Mn(C13H13OP)4(H2O)2][MnCl4] or [Mn(MDPPO)4(H2O)2][MnCl4] (MDPPO is methyldiphenylphosphine oxide), was synthesized through the solvothermal reaction of MnCl2 with the neutral molecule MDPPO. In this compound, [Mn(MDPPO)4(H2O)2]2+ acts as the cation, while [MnCl4]2- serves as the anion, enabling the co-existence of tetrahedral and octahedral structures within the same system. Remarkably, the compound exhibits efficient red-light emission at 662â nm, distinct from the green-light emission typically observed in MnX4-based halides. Theoretical calculations show that the red emission comes from the charge transfer from the MDPPO to the Mn2+ of [MnCl4]2-. This work provides a new perspective for the design and synthesis of red-light-emitting manganese-based halides with unique structures.
RESUMO
The plants in the genus Gardenia (Rubiaceae) have long been used as traditional medicines in China. In this study, two new 3,4-seco-cycloartane triterpenes, sootepin J (1) and sootepin K (2), and a novel nor-3,4-seco-cycloartane triterpenes, sootepin L (3), together with two known compounds (4-5), were isolated from the methanolic extract of the leaves and twigs of Gardenia sootepensis. The structures of the new compounds were elucidated by combinations of 1D, 2D NMR experiments and HR-MS data, while the known compounds were identified by comparison of the NMR data with previously published data.
Assuntos
Gardenia/química , Triterpenos/isolamento & purificação , China , Estrutura Molecular , Folhas de Planta/química , Análise Espectral , Triterpenos/químicaRESUMO
BACKGROUND: How to develop new cotton varieties possessing high yield traits of Upland cotton and superior fiber quality traits of Sea Island cotton remains a key task for cotton breeders and researchers. While multiple attempts bring in little significant progresses, the development of Chromosome Segment Substitution Lines (CSSLs) from Gossypium barbadense in G. hirsutum background provided ideal materials for aforementioned breeding purposes in upland cotton improvement. Based on the excellent fiber performance and relatively clear chromosome substitution segments information identified by Simple Sequence Repeat (SSR) markers, two CSSLs, MBI9915 and MBI9749, together with the recurrent parent CCRI36 were chosen to conduct transcriptome sequencing during the development stages of fiber elongation and Secondary Cell Wall (SCW) synthesis (from 10DPA and 28DPA), aiming at revealing the mechanism of fiber development and the potential contribution of chromosome substitution segments from Sea Island cotton to fiber development of Upland cotton. RESULTS: In total, 15 RNA-seq libraries were constructed and sequenced separately, generating 705.433 million clean reads with mean GC content of 45.13% and average Q30 of 90.26%. Through multiple comparisons between libraries, 1801 differentially expressed genes (DEGs) were identified, of which the 902 up-regulated DEGs were mainly involved in cell wall organization and response to oxidative stress and auxin, while the 898 down-regulated ones participated in translation, regulation of transcription, DNA-templated and cytoplasmic translation based on GO annotation and KEGG enrichment analysis. Subsequently, STEM software was performed to explicate the temporal expression pattern of DEGs. Two peroxidases and four flavonoid pathway-related genes were identified in the "oxidation-reduction process", which could play a role in fiber development and quality formation. Finally, the reliability of RNA-seq data was validated by quantitative real-time PCR of randomly selected 20 genes. CONCLUSIONS: The present report focuses on the similarities and differences of transcriptome profiles between the two CSSLs and the recurrent parent CCRI36 and provides novel insights into the molecular mechanism of fiber development, and into further exploration of the feasible contribution of G. barbadense substitution segments to fiber quality formation, which will lay solid foundation for simultaneously improving fiber yield and quality of upland cotton through CSSLs.
Assuntos
Cromossomos de Plantas/genética , Fibra de Algodão , Perfilação da Expressão Gênica , Gossypium/crescimento & desenvolvimento , Gossypium/genética , Hibridização Genética , Parede Celular/metabolismo , Gossypium/citologia , Fenótipo , Reprodutibilidade dos TestesRESUMO
Two new cyclic nonapeptides, named clausenlanins A (1) and B (2), were isolated from the roots and rhizomes of Clausena lansium. Their structures were elucidated as cyclo-(Gly1-L-Leu2-L-Ile3-L-Leu4-L-Leu5-L-Leu6-L-Leu7-L-Leu8-L-Leu9) (1) and cyclo-(Gly1-L-Leu2-L-Val3-L-Leu4-L-Leu5-L-Leu6-L-Leu7-L-Leu8-L-Leu9) (2) respectively on the basis of extensive spectroscopic analysis, particularly 2D NMR spectra taken at the temperature of 338 or 303 K and MS.
RESUMO
Three new C20 quassinoids nigakilactone P (1), picraqualide F (2), nigakilactone Q (3), along with eight known quassinoids (4-11), were isolated from the 95% EtOH extract of the stems of Picrasma quassioides. The structures of the new compounds were elucidated by means of HRESIMS and different NMR techniques. Assignments of relative and absolute configurations for these compounds were achieved on the basis of ROESY spectra and quantum chemical ECD calculation. In vitro activity assays, none of the compounds showed cytotoxic (IC50>50 µM) and NO production-inhibitory activities (IC50>30 µM), and the structure-activity relationships of quassinoids were summarized. In addition, the chemotaxonomic significance of the isolated compounds was also discussed.
Assuntos
Picrasma/química , Extratos Vegetais/química , Quassinas/química , Células Hep G2 , Humanos , Concentração Inibidora 50 , Células MCF-7 , Estrutura Molecular , Óxido Nítrico/química , Caules de Planta/química , Quassinas/isolamento & purificação , Relação Estrutura-AtividadeRESUMO
Two new 3,4-seco-cycloartane triterpenes, named sootepins H (1) and I (2), were isolated from the ethyl acetate extract of the leaves and twigs of Gardenia sootepensis. Their structures were elucidated on the basis of 1D- and 2D-nuclear magnetic resonance (NMR) analysis, as well as high-resolution mass spectrometry (HR-MS), infrared (IR), and ultra violet (UV).
Assuntos
Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Gardenia/química , Triterpenos/isolamento & purificação , Antineoplásicos Fitogênicos/farmacologia , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Folhas de Planta/química , Caules de Planta/química , Relação Estrutura-Atividade , Triterpenos/químicaRESUMO
Two novel naphthohydroquinone dimers with unprecedented skeletons, rubialatins A (1) and B (2), were isolated from the herbal plant Rubia alata together with their precursor, mollugin (3). The structures were elucidated on the basis of NMR spectra and crystal X-ray diffraction. Compound 1, a racemate, was separated by chiral column chromatography, and the absolute configurations of the enantiomers were determined by the computational methods. Cytotoxicity of 1-3 was evaluated as well as the effect on the NF-κB pathway. Compound (+)-1 showed cytotoxicity and could inhibit NF-κB pathway. Meanwhile, 2 showed cytotoxicity and a synergistic effect with TNF-α on NF-κB activation.
Assuntos
Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Hidroquinonas/química , Hidroquinonas/farmacologia , Hidroquinonas/toxicidade , NF-kappa B/química , NF-kappa B/efeitos dos fármacos , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Raízes de Plantas/química , Piranos/química , Rubia/química , Fator de Necrose Tumoral alfa/química , Fator de Necrose Tumoral alfa/efeitos dos fármacos , Linhagem Celular Tumoral , Humanos , Hidroquinonas/isolamento & purificação , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Piranos/isolamento & purificação , Estereoisomerismo , Fator de Necrose Tumoral alfa/metabolismo , Difração de Raios XRESUMO
To investigate monoterpenes and sesquiterpenes of the stems and leaves of Clausena excavata, an AcOEt fraction of the methanol extract was subjected on column chromatographies including silica gel and RP-18, as well as preparative HPLC. The structures of compounds isolated were identified on the basis of spectroscopic data as excamonoterpene (1), (6R, 9S)-9, 10-dihydroxy-4-megastigmen-3-one (2), (3R, 6R, 7E) -3-hydroxy-4, 7-megastigmadien-9-one (3), (3S) -3-hydroxy-7, 8-dihydro-beta-ionone (4), (3S, 5R, 6S) -3-hydroxy-5,6-epoxy-beta-ionone (5), (6R, 9R) -9-hydroxy-4-megastigmen-3-one (6), (3S, SR) -dihydroxy-6, 7-megstigmadien-9-one(7), (-)-loliolide(8), caryolane-1, 9alpha-diol(9) and 2, 6-dihydroxyhumula-3 (12), 7 (13), 9(E)-triene (10), were isolated from the stems and leaves of C. excavata. Compound 1 is a new monoterpene, named as excamonoterpene. Compounds 2-10 were isolated from this plant for the first time.
Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Clausena/química , Monoterpenos/análise , Sesquiterpenos/análise , Espectroscopia de Ressonância Magnética , Metanol/química , Estrutura Molecular , Monoterpenos/química , Folhas de Planta/química , Caules de Planta/química , Sesquiterpenos/química , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
A new phenethanol, (2'R)-4-(2', 3'-dihydroxy-3'-methyl-butanoxy)-phenethanol (1), along with other eleven known benzene derivatives (2-12) were isolated from the roots, stems and leaves of Clausena excavata (Rutaceae). Compounds 3 and 4 are new natural products, and compounds 5-8, 10-12 were isolated from C. excavata for the first time. Their structures were elucidated on the basis of MS, 1D and 2D NMR spectroscopic analyses including HSQC, COSY and HMBC experiments. 1 was tested for its cytotoxicities against A549, HeLa and BGC-823 cancer cell lines, and antimicrobial activities against Candida albicans and Staphylococcus aureus. The results showed that 1 did not exhibit cytotoxic and antimicrobial activities.
Assuntos
Derivados de Benzeno/química , Clausena/química , Candida albicans/efeitos dos fármacos , Linhagem Celular Tumoral , Células HeLa , Humanos , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Folhas de Planta/química , Raízes de Plantas/química , Caules de Planta/química , Staphylococcus aureus/efeitos dos fármacosRESUMO
One new carbazole alkaloid, excavatine A (1), and two additional new alkaloids, excavatine B (2) and excavatine C (3), were isolated from the stems and leaves of Clausena excavata Burm.f. (Rutaceae). Their structures were determined on the basis of detailed spectroscopic analyses, especially 2D-NMR and HR-EI-MS data. Compounds 1-3 were tested for their cytotoxic activities against A549, HeLa, and BGC-823 cancer cell lines, and for their antimicrobial activities against Candida albicans and Staphylococcus aureus. Only 1 exhibited cytotoxicity against A549 and HeLa cell lines with the IC50 values of 5.25 and 1.91â µg/ml, respectively.