Most known chemiluminescence (CL) reactions exhibit flash-type light emission. Great efforts have been devoted to the development of CL systems that emit with high intensity and long-lasting time. However, a system can last for hundreds hours is yet-to-be-demonstrated. Here we show firefly-mimicking intensive hydrogels consisting chitosan, reagent N-(4-aminobutyl)-N-ethylisoluminol (ABEI) catalyst Co2+. The emission even visible naked eyes lasts over 150 h when are mixed H2O2. This...

The Cu-catalyzed 1,4-protosilylation and protoborylation of trifluoromethyl-substituted conjugated enynes were developed to access functionalized homoallenylsilanes homoallenylboronates. This protocol also provides a general method synthesize optically active homoallenylboronates in moderate excellent yields with high enantiomeric excess by using new designed chiral bisoxazoline ligands. Simultaneously, the transformations explored useful building blocks.

Tuberculosis (TB) remains one of the leading causes morbidity and mortality all over world multidrug resistance TB (MDR-TB) pose a serious threat to control represent an increasing public health problem. In this work, we report homogeneous signal-on electrochemiluminescence (ECL) DNA sensor for sensitive specific detection rpoB genes MDR-TB by using ruthenium(II) complex functionalized graphene oxide (Ru–GO) as suspension sensing interface ferrocene-labeled ssDNA (Fc–ssDNA) ECL intensity...

We report a copper-catalyzed ligand-controlled selective 1,2- and 1,4-hydrosilylation of 1,3-enynes, which furnishes enantiomerically enriched propargyl- 1,2-allenylsilane products in high yields with excellent enantioselectivities (up to 99% ee). This reaction proceeds under mild conditions, shows broad substrate scope for both 1,3-enynes trihydrosilanes, displays regioselectivities. Mechanistic studies based on deuterium-labeling reactions density functional theory (DFT) calculations...

Graphene- or graphene oxide (GO)-supported metallic nanoparticles and single metal atom as potentially effective catalysts for chemical reactions have recently received extensive research interests. However, utilization in nanoparticle is limited atoms readily drift on the surface consequently form aggregated large particles, making practical applications limited. Here, we report ions directly immobilized GO a novel GO-supported single-ion catalyst chemiluminecence (CL) reactions. It found...

Preparation of large amount single-stranded circular DNA in high selectivity is crucial for further developments nanotechnology and other sciences. Herein, a simple but practically useful methodology to prepare rings has been presented. One the essential factors use highly diluted T4 ligase buffer reactions. This strategy based on our unexpected finding that, buffers, intermolecular polymerization fragments greatly suppressed with respect their intramolecular cyclization. promotion...

A copper-catalyzed 1,4-protosilylation of α-alkynyl-enones to form the functionalized chiral homoallenylsilanes was developed. In presence a monopyridine oxazoline ligand, variety trisubstituted allene derivatives bearing contiguous stereogenic center and axis were prepared in good yields with excellent enantioselectivities diastereoselectivities.

A novel signal-on chemiluminescence (CL) assay for pyrophosphatase (PPase) activity determination was innovatively developed based on the Cu(II)-regulated on-site assembly of highly chemiluminescent Cu(II), N-(aminobutyl)-N-(ethylisoluminol) (ABEI), gold nanodot, and chitosan multifunctionalized carbon nanotubes (Cu(II)/ABEI–Au/cs–CNTs). First, ABEI-functionalized nanodots (ABEI–Au) were assembled surface chitosan-modified (cs–CNTs) via reduction HAuCl4 with ABEI in a cs–CNT suspension to...

Screening a novel electrochemiluminescence (ECL) system and lowering the ECL triggering potential are essential to evolution. Herein, near-infrared (NIR) with low-triggering was constructed weakly reductive

Correlated chemiluminescence imaging and structural characterization of single particles helped the rational design functional materials with significantly improved performance.

A trace lead ion (Pb 2+ ) detection platform combining surface-enhanced Raman spectroscopy (SERS) with nucleic acid cycle multiple signal amplification.

In this manuscript, lucigenin and Co²⁺complex bifunctionalized graphene oxide hybrids (Co(Trp)₂/Luc/GO) were synthesized<italic>via</italic>a facile simple strategy. The as-prepared Co(Trp)₂/Luc/GO exhibited excellent CL activity with H₂O₂and ascorbic acid.

A copper-catalyzed regioselective 1,4- and 1,6-conjugate addition of a silyl reagent to diendioates was established.

<italic>N</italic>-(4-Aminobutyl)-<italic>N</italic>-ethylisoluminol and CoFe₂O₄ nanoparticle functionalized graphene hybrids were synthesized exhibited excellent chemiluminescence electrochemiluminescence activities rapid magnetic separation performance.

The as-prepared Co^II(HQS)₂/ABEI/rGO hybrids exhibited excellent CL activity when reacted with hydrogen peroxide, the dissolved oxygen and periodate in alkaline solution.

Abstract Topologically controlled DNA catenanes are promising elements for the construction of molecular machines but present a significant effort in nanotechnology. We report an efficient approach preparing linear three‐ring (L3C) composed single‐stranded DNA. The linking number was strictly by using short complementary regions (6 nt) between each two rings. High efficiency forming (yield as high 63 %) obtained 80 nt oligonucleotide scaffold to draw close three pre‐rings hybridization After...

In spite of remarkable progress in synthetic methodology, a closed three-link chain (one the simplest but most important topological isomers [3]catenane) has never been prepared. Here we synthesized this isomer high yield from three oligonucleotides which are designed to optimize various chemical and steric factors their mutual hybridization.

Thread level speculation (TLS) and transactional memory (TM) are both proposed to address the problem of productivity in multi-core era. Both them require similar underlying support. In this paper, we propose a low-design-complexity approach effective unified support for TLS & TM, by extending scalable TM model TLS. The baseline chosen is LogTM. A distributed hardware arbitration mechanism also intensify scalability. This method takes advantage resources introduced resulting simplified...

A disposable screen-printed carbon electrode (SPCE) for point-of-care detection platform was developed human chorionic gonadotropin (hCG). sandwich assay employing gold-nanoparticles characterized with differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). hCG analyzed between 100 pg/mL 1 ng/mL, a limit of observed 2-µL sample volume. This versatile can be easily adapted decentralized immunosensing clinically important hormones.

In this paper, a novel image contrast enhancement method, based on multiscale transform and limited adaptive histogram equalization, is proposed for enhancing the X-ray images. Firstly, Laplacian pyramid adopted to decompose input image, which can extract characteristic of image. Secondly, equalization (CLAHE) used Comparing with traditional (AHE) global CLAHE effectively intensifies at same time restrains noise enlarged. order make enhanced become more smoothing, we adjust low frequency...