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Green behavior is an important part of the study of green development. To promote green development, it is necessary to engage in further innovation on the basis of lessons from international advancements in green behavior. To clarify the spatial and temporal distribution characteristics of international researchers in the study of green behavior, the research focus, and the research frontiers, a visual analysis was performed on 22,114 articles cited in the SSCI and SCI-EXPANDED databases from 2000 to 2017. This analysis was based on bibliometrics and mapping knowledge domain (MKD) analysis with CiteSpace 5.3.R4, a scientific and technological text-mining and visualization software. The results show that international green behavior research has the following main characteristics. First, a positive correlation was found between the number of papers and time. Second, research is highly valued by researchers in the natural sciences, such as ecology. The USA is involved in major research efforts and maintains a high level of cooperation with other countries and regions. International cooperation among institutions needs to be strengthened. The co-cited journals are primarily academic journals in the natural sciences. Third, research hotspots mainly focus on the theory of planned behavior (TPB), consumers, attitudes, performance, and environment, all of which evolve according to the phase path of “germination-growth.” Fourth, the research frontier issues are largely related to management science and environmental science, and the research objects and methods will become increasingly complex and interdisciplinary over time.

N-N axially chiral biaryls represent a rarely explored class of atropisomers. Reported herein is construction of diverse classes of diaxially chiral biaryls containing N-N and C-N/C-C diaxes in distal positions in excellent enantioselectivity and diastereoselectivity. The N-N chiral axis in the products provides a handle toward solvent-driven diastereodivergence, as has been realized in the coupling of a large scope of benzamides and sterically hindered alkynes, affording diaxes in complementary diastereoselectivity. The diastereodivergence has been elucidated by computational studies which revealed that the hexafluoroisopropanol (HFIP) solvent molecule participated in an unusual manner as a solvent as well as a ligand and switched the sequence of two competing elementary steps, resulting in switch of the stereoselectivity of the alkyne insertion and inversion of the configuration of the C-C axis. Further cleavage of the N-directing group in the diaxial chiral products transforms the diastereodivergence to enantiodivergence. Molecules with axial chirality are of intense focus to the synthetic organic community, but the axes most commonly explored are carbon–carbon and carbon–heteroatom. Here the authors report the syntheses of diaxially chiral biaryls containing N-N and C-N/C-C axes, achieved via rhodium catalysis.

The green development behavior of construction enterprises is an environmental behavior that contributes evidence from construction enterprises to the field of resource recycling and environmental protection. Revealing the mechanism of green development behavior of construction enterprises has become the key to guide construction enterprises to adopt green development behavior and improve the level of green development. However, existing studies on the mechanistic discussion of green development behavior of construction enterprises do not reach a consensus. In order to reveal the mechanism of the green development behavior of construction enterprises, this study examines how the green development behavior of construction enterprises is influenced by factors based on the Theory of Planned Behavior. Using partial least squares structural equation modeling (PLS-SEM), this study analyzed 306 questionnaire data points from construction enterprises in 28 provinces (cities) across China. The main conclusions are as follows. (1) Attitudes, subjective norms and perceived behavioral control have significant positive effects on the green development behavioral intentions of construction enterprises, with attitudes being the strongest predictor. (2) Intention intermediates the relationships between attitude, subjective norms, perceived behavioral control, and the green development behavior of construction enterprises to varying degrees. (3) Regional green development level and enterprise size positively moderate the four groups of the relationship between attitude, subjective norms, perceived behavioral control, intention and green development behavior of construction enterprises. This study provides theoretical guidance for promoting green transformation and upgrading construction enterprises and helps the construction industry achieve a balanced mode of development that supports both economic growth and environmental protection.

Resource utilization of construction and demolition waste (CDW) is regarded to be an important means of achieving the sustainable development of the economy and the environment. However, previous research has not fully considered the green degree of products in the demand function of CDW remanufactured products. This study aimed to clarify how consumers’ green preferences and government subsidies affect decision making in the supply chain. First, a CDW resource utilization supply chain model composed of building materials manufacturers and retailers was constructed using consumer behavior theory. Second, the optimal decision making of members under conditions of decentralized and centralized decision making was analyzed using the Stackelberg game solution. Finally, the validity of the model and conclusions were verified by numerical simulation. The main conclusions are as follows. Government subsidies have a different impact on the pricing of new building materials products and CDW remanufactured products. Under decentralized decision making, the optimal profit of the CDW resource utilization supply chain with government subsidies is higher. However, under centralized decision making, the optimal profit is also related to consumers’ green preferences. According to consumers’ green preferences, choosing different decision-making models can not only improve the total profit of the CDW resource utilization supply chain, but also improve the reuse rate of CDW.

Boron-stereogenic and C–B axially chiral compounds featuring boron-based chirality represent a rarely explored class of chiral scaffolds. Reported herein is asymmetric access to boron-stereogenic and C–B axially chiral (hetero)cycles via rhodium-catalyzed C–H activation of (hetero)arenes en route to [4 + 2] or [3 + 2] annulation with two classes of boron-functionalized alkynes. The annulation of tetracoordinate gem -dialkynylboron with two classes of arenes affords B-stereogenic (hetero)cycles via desymmetrization of the diyne. The employment of tricoordinate, sterically hindered boron-functionalized alkynes in [4 + 2] annulation with 2-carboxamide-functinalized indole affords C–B axially chiral biaryls via C(3)–H activation of the indole ring (up to 99% ee). All the coupling reactions proceed with good functional group tolerance, chemoselectivity, and high enantioselectivity under mild reaction conditions, requiring no stoichiometric amount of oxidant. The chiral product exhibits limited configurational stability that is intrinsic in boron-based chirality. Moreover, the coupling system allows delivery of chiral organoboron compounds bearing diverse drug-like molecular scaffolds. Photophysical properties of representative axially chiral products have been explored. Boron-stereogenic and C–B axially chiral compounds featuring boron-based chirality represent a rarely explored class of chiral scaffolds. Here, the authors report an asymmetric access to boron-stereogenic and C–B axially chiral (hetero)cycles via rhodium-catalyzed C–H activation of (hetero)arenes en route to [4 + 2] or [3 + 2] annulation with two classes of boron-functionalized alkynes.

Based on the objective of global carbon emission reduction, the green technology innovation efficiencies of construction enterprises (GTIE–CE) have attracted attention in various countries and regions worldwide. However, researchers have not yet assessed GTIE–CE from the perspectives of asymmetric innovation theory, resource orchestration theory and eco-innovation theory. To reveal the changes in GTIE–CE, an index system is constructed to measure this efficiency based on resource orchestration theory and eco-innovation theory. In addition, based on the asymmetric innovation theory, this study uses the spatial variance function and PVAR model to reveal the evolution mechanism of GTIE–CE with respect to market, government and technology dimensions. The main conclusions are as follows. (1) Regional heterogeneity is present in GTIE–CE in China, and the appearance of high efficiency spreads from the Yangtze River Delta and Pearl River Delta to the surrounding areas. (2) The market dimension positively affects the green technology innovation efficiency of construction enterprises, but this effect is delayed. (3) The government dimension significantly promotes the improvement in GTIE–CE, but this effect is delayed. This study provides an integrated theoretical perspective that reveals the mechanism of GTIE–CE, helps to broaden the research in the field of GTIE–CE, in addition to insights from China to further promote the green transformation of these enterprises.

Background Persistent high-risk Human papillomavirus (HPV) subtypes infection has been implicated as a causative of cervical cancer. Distribution and genotypes of HPV infection among females and their variations would assist in the formulation of preventive strategy for cervical cancer. The purpose of the present study is to investigate the prevalence of HPV among females in central China. Methods The distribution and genotypes of HPV among 9943 females attending the gynecological examinations in central of China during 2015–2021 were investigated. HPV genotypes were detected using a commercial kit. Nucleotides sequences of L1, E6 and E7 genes in HPV16 or HPV52 positive samples collected in 2021 were amplified by polymerase chain reaction (PCR). Variations of L1, E6 and E7 in HPV16 and HPV52 were gained by sequencing and compared with the reference sequence. Sublineages of HPV16 and HPV52 were determined by the construction of phylogenetic tree based on L1 gene. Results The overall prevalence of HPV infection was 22.81%, with the infection rate of high-risk human papillomavirus (HR-HPV) was 19.02% and low-risk human papillomavirus (LR-HPV) was 6.40%. The most top five genotypes of HPV infection were HPV16 (7.49%), HPV52 (3.04%), HPV58 (2.36%), HPV18 (1.65%) and HPV51 (1.61%). Plots of the age-infection rate showed that the single HPV, multiple HPV, HR-HPV, LR-HPV infection revealed the same tendency with two peaks of HPV infection were observed among females aged ≤ 20 year-old and 60–65 year-old. The predominant sublineage of HPV16 was A1 and B2 for HPV52. For HPV16, The most prevalent mutations were T266A (27/27) and N181T (7/27) for L1, D32E for E6 and S63F for E7 in HPV16. For HPV52, all of the nucleotide changes were synonymous mutation in L1 (except L5S) and E7 genes. The K93R mutation was observed in most HPV52 E6 protein. Conclusions The present study provides basic information about the distribution, genotypes and variations of HPV among females population in Henan province, which would assist in the formulation of preventive strategies and improvements of diagnostic probe and vaccine for HPV in this region.

The climate crisis and ecological degradation highlight the importance of achieving green development in the construction materials enterprises. However, the transformation process faces numerous obstacles, and research on the configurational effects of enterprise green development behavior remains insufficient. Using new institutional theory and strategic cognition theory as guides, this study takes 53 construction materials enterprises listed on the Shanghai and Shenzhen A-share markets in China from 2010 to 2021 as the research samples and applies fuzzy-set qualitative comparative analysis (fsQCA) to reveal the configuration paths of green development behaviors in construction materials enterprises. This study reveals that (1) individual antecedent conditions are not necessary to drive green development behavior in construction materials enterprises, and executive green cognition can play a more pervasive role; (2) four driving paths are formed: public opinion crisis type, public surveillance type, market incentive type, and institutional environmental copromotion type, with all four paths sharing the characteristic of “different paths to the same destination”; (3) there is an alternative relationship between social surveillance and market liberalization in driving the green development behavior of enterprises. The research conclusions provide new perspectives and ideas to the field of enterprise green development behavior and offer strategic options for construction materials enterprises to achieve green development under different conditions.

The activation of C—C bonds enables rapid construction of new organic frameworks owing to facile structural reorganization. Nevertheless, enantioselective C—C activation remains heavily underexplored and has been predominantly limited to intramolecular reactions. We herein report two categories of asymmetric intermolecular [4 + 2] annulations between benzocyclobutenones (BCBs) and unsaturated reagents, namely, alkynes and cyclic dicarbonyl compounds. The atroposelective coupling of BCB with several classes of sterically hindered alkynes afford C—N and C—C axially chiral 2-naphthols. The [4 + 2] annulation of BCBs and α -dicarbonyls afford spirocyclic products. Both coupling systems proceed efficiently with excellent regio-, chemo- and enantioselectivity via substrate activation and judicious choice of chiral bidentate phosphine ligands. Synthetic transformations of selected products are demonstrated, and the derived chiral products are shown to be useful additives in C—H bond activation or as ligands in Pd-catalyzed C—C coupling. Enantioselective C—C activation remains heavily underexplored and has been predominantly limited to intramolecular reactions. Here the authors report two categories of asymmetric intermolecular [4+2] annulations between benzocyclobutenones and unsaturated reagents, namely, alkynes and cyclic dicarbonyl compounds.

In recent years, cross-regional waste management has garnered significant academic interest, yet systematic reviews of related research remain scarce. Therefore, this study employed the PRISMA methodology to conduct a systematic review of 58 papers from the Web of Science and Scopus databases, aiming to clarify the current state of research in this field and explore future directions. Through analysis, five research themes were identified: management characteristics, core challenges, policy and regulation, technological innovation, and impact assessment. Research findings indicate that quantitative analysis constitutes 60% of the literature, representing the core methodology used in studies of cross-regional waste management. The challenges encountered in cross-regional waste management primarily manifest in three areas: environmental impacts, stakeholder relationships, and policy frameworks. Achieving cross-regional coordination necessitates collaborative efforts from governments, corporations, and society. This study further proposes future research directions providing support for future investigations by governments, universities, and corporate personnel.