Luminescence regulation of Sb^(3+)in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting

The Sb^(3+) doping strategy has been proven to be an effective way to regulate the band gap and improve the photophysical properties of organic-inorganic hybrid metal halides(OIHMHs).However,the emission of Sb^(3+) ions in OIHMHs is primarily confined to the low energy region,resulting in yellow or red emissions.To date,there are few reports about green emission of Sb^(3+)-doped OIHMHs.Here,we present a novel approach for regulating the luminescence of Sb^(3+) ions in 0D C_(10)H_(2)_(2)N_(6)InCl_(7)·H_(2)O via hydrogen bond network,in which water molecules act as agents for hydrogen bonding.Sb^(3+)-doped C_(10)H_(2)2N_(6)InCl_(7)·H_(2)O shows a broadband green emission peaking at 540 nm and a high photoluminescence quantum yield(PLQY)of 80%.It is found that the intense green emission stems from the radiative recombination of the self-trapped excitons(STEs).Upon removal of water molecules with heat,C_(10)H_(2)_(2)N_(6)In_(1-x)Sb_(x)Cl_(7) generates yellow emis-sion,attributed to the breaking of the hydrogen bond network and large structural distortions of excited state.Once water molecules are adsorbed by C_(10)H_(2)_(2)N_(6)In_(1-x)Sb_(x)Cl_(7),it can subsequently emit green light.This water-induced reversible emission switching is successfully used for optical security and information encryption.Our findings expand the under-standing of how the local coordination structure influences the photophysical mechanism in Sb^(3+)-doped metal halides and provide a novel method to control the STEs emission.

High-resolution imaging of magnetic fields of banknote anti-counterfeiting strip using fiber diamond probe

Counterfeiting of modern banknotes poses a significant challenge,prompting the use of various preventive measures.One such measure is the magnetic anti-counterfeiting strip.However,due to its inherent weak magnetic properties,visualizing its magnetic distribution has been a longstanding challenge.In this work,we introduce an innovative method by using a fiber optic diamond probe,a highly sensitive quantum sensor designed specifically for detecting extremely weak magnetic fields.We employ this probe to achieve high-resolution imaging of the magnetic fields associated with the RMB 50denomination anti-counterfeiting strip.Additionally,we conduct computer simulations by using COMSOL Multiphysics software to deduce the potential geometric characteristics and material composition of the magnetic region within the anti-counterfeiting strip.The findings and method presented in this study hold broader significance,extending the RMB 50 denomination to various denominations of the Chinese currency and other items that employ magnetic anti-counterfeiting strips.These advances have the potential to significantly improve and promote security measures in order to prevent the banknotes from being counterfeited.

微课在职业院校英语应用文写作教学中的应用——以notice为例

职业院校的英语教学应遵循＂实用为主,够用为度＂的原则,应用文写作教学一直是英语教学中的＂鸡肋＂,难啃但很具实用性。微课的引入摆脱了授课型教学单调乏味的特性,又能准确高效地帮助学生掌握基础的英语应用文体的写作技巧。如何发挥微课在英语应用文写作课堂教学中的作用是本文的研究重点,本文以notice为例加以阐释。

Assessment of retracted papers,and their retraction notices,from a cancer journal associated with“paper mills”

Cancer research is occasionally described as being in a reproducibility crisis.The cancer literature has ample papers retracted due to misconduct,including the use of paper mills,invalid authorship,or fake data.The objective of this paper was to gain an appreciation of the balance of retractions and associated retraction notices of 23 retracted Cancer Biotherapy and Radiopharmaceuticals papers associated with paper mills.By 23 March 2023,these retracted papers had already accumulated 287 citations according to Web of Science Core Collection,253 according to Scopus,and 365 according to Google Scholar,i.e.,metrically speaking,they were highly rewarded.All authors had an affiliation(71%being a hospital)in China.Most(12/21;57%)of corresponding authors had emails with a@163.com suffix.Four of the retraction notices(i.e.,17%)explicitly indicated paper mills as a reason for retraction although,in general,the retraction notices lacked details and background that could assist readers’understanding of the retractions.

Water-sensitive multicolor luminescence in lanthanide-organic framework for anti-counterfeiting

The developme nt of high-level an ti-co un terfeiti ng tech niq ues is of great sig nifica nee in econo mics and security issues.However,i ntricate read ing methods are required to obta in multi-level info rmati on stored in differe nt colors,which greatly limits the applicati on of an ti-co un terfeit ing tech no logy on sol ving real world problems.Here in,we realize multicolor information anti-counterfeiting under simply external stimulation by utilizing the functional groups and multiple emission centers of lanthanide metal organic framework(Ln-MOFs)to tune luminescence color.Water responsive multicolor luminescence represented by both the tunable color from red to blue within the visible region and high sensitive responsivity has bee n achieved,owing to the in creased nonr adiative decay pathways and enhan ced Eu3+-to-liga nd en ergy back tra nsfer.Remarkably,i nfo rmatio n hidde n in differe nt colors n eeds to be read with a specific water content,which can be used as an en crypti on key to en sure the security of the info rmati on for high-level an ti-co un terfeiti ng.

RFID Anti-Counterfeiting for Retailing Systems

Counterfeiting is one of the most serious problems in the consumer market. One promising approach for anti-counterfeiting is to attach a low-cost Radio-frequency Identification (RFID) tag to the product authentication. In this paper, we propose an RFID system for detecting counterfeiting products. This RFID system consists of the tag authentication protocol and the database correction protocol. We use the tag authentication protocol for authenticating tags without revealing their sensitive information. This protocol also allows the customer to freely inquire the tag. To prevent the widespread of the counterfeit products, we use the tag status information along with tag identity information. Meanwhile, the database correction protocol guarantees the correctness of the tag status. Our anti-counterfeiting system is the first work considering the seller who plays an important role in the consumer product supply chain. Finally, we show that anti-counterfeiting system is quite secure against counterfeiting and the tag authentication protocol is lightweight enough to be implemented in RFID-based applications.

Notice Soliciting Subscription to “Journal of Central South University of Technology”

Central South University (CSU) is one of Chinese key universities,which is affiliated with the Ministry of Education.

Retraction notice to "Antimicrobial secondary metabolites from marine gastropod egg capsules and egg masses" [APJTB Volume 2 Issue 11(2012) 916-922]

This article has been retracted:please see Elsevier Policy on Article Withdrawal(http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Editor-in-Chief and the First Author.Both the first author and the journal’s editor confirmed that Dr.A Yogamoorthi is not responsible for the plagiarism since his/her name was added without consent.

Chemical Research in Chinese Universities Notice to Authors

ＣｈｅｍｉｃａｌＲｅｓｅａｒｃｈｉｎＣｈｉｎｅｓｅＵｎｉｖｅｒｓｉｔｉｅｓＮｏｔｉｃｅｔｏＡｕｔｈｏｒｓ＂ＣｈｅｍｉｃａｌＲｅｓｅａｒｃｈｉｎＣｈｉｎｅｓｅＵｎｉｖｅｒｓｉｔｉｅｓ＂，ｓｐｏｎｓｏｒｅｄｂｙｔｈｅＳｔａｔｅＥｄｕｃａｔｉｏｎａｌＣｏｍ...

NOTICE FOR AUTHORS

Cell Research, a peer-reviewed international journal in English, publishes significant original researches in cell biology and molecular cell biology. The journal is indexed in Index Medicus/MEDLlNE, BIOSIS database, Chemical Abstracts, VINITI, ISI Science Citation Index, Current Contents Life Sciences, SciSearch, etc. Free full- text article of the journal is available online at website: http:// www.cell-research.com. which is linked to PubMed in NCBI of NLM USA. Editors in Shanghai, Bethesda, Piscataway, Toronto, Oxford, London and Sydney welcome submissions from all over the world.

NOTICE

1. The Journal Analysis in Theory and Applications （ abbr. ATA used to be Approximation Theory and its Applications in 1984-2002） publishes original papers in the following fields：

NOTICE

1. The Journal Analysis in Theory and Applications （ abbr. ATA used to be Approximation Theory and its Applications in 1984-2002） publishes original papers in the following fields： Approximation Theory, Computational Analysis, Dynamic Systems, Fractals, Function Spaces, Geometric Analysis, Harmonic Analysis, Numerical Approxima-tion, Signal Analysis, Special Functions, Transform Analysis and Wavelets, as well as their applications.

NOTICE

1.The Journal Analysis in Theory and Applications (abbr.ATA used to be Approximation Theory and its Applications in 1984-2002) publishes original papers in the following fields:

NOTICE

1. The Journal Analysis in Theory and Applications ( abbr. ATA used to be Approximation Theory and its Applications in 1984-2002) publishes original papers in the following fields: Approximation Theory, Computational Analysis, Dynamic Systems, Fractals, Function Spaces,

NOTICE

1. The Journal Analysis in Theory and Applications （abbr. ATA used to be Approximation Theory and its Applications in 1984-2002） publishes original papers in the following fields：

NOTICE

1. The Journal Analysis in Theory and Applications （ abbr. ATA used to be Approximation Theory and its Applications in 1984-2002） publishes original papers in the following fields：