1
|
Li J, Qi Y, Yang R, Chen X, Chen Z, Zhu JJ. Intellectualized Visualization of Single-Particle Raman Spectra for Sensitive Detection and Simultaneous Multianalysis of Heavy Metal Ions. Anal Chem 2023; 95:14736-14745. [PMID: 37737121 DOI: 10.1021/acs.analchem.3c02851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Easy-to-use, reliable, and real-time methods for detecting heavy metal ion contamination are urgently required, which is a primary concern for water pollution control and human health. However, present methods for this aim are still unable to achieve simultaneous multianalysis for complex real sample detection. Herein, an intellectualized vision-based single-nanoparticle Raman imaging strategy combined with ion-responsive functional nucleic acids (FNAs) was proposed to address these issues. We reported a correspondence between the concentration of the analytes and the density of particles (DOP) of specifically captured nanoparticles to achieve sensitive detection and simultaneous multianalysis of heavy metal ions. The specific detection of Pb2+ (Hg2+) was obtained with a detection linear range from 100 pM to 100 nM (from 500 fM to 100 nM) and limit of detections low to 1 pM (100 fM), with the advantages of good specificity, excellent homogeneity, and reproducibility. Furthermore, the differentiation of different heavy metal ions (Pb2+/Hg2+) was achieved, i.e., the simultaneous multianalysis, based on Raman imaging of the single particle and intelligent machine vision method. Finally, the Raman imaging assay was utilized for real sample analysis, and it provided a powerful and reliable tool for detecting trace Pb2+/Hg2+ in real water samples and facilitated the portable on-site monitoring of heavy metal ions.
Collapse
Affiliation(s)
- Jinxiang Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Yongbing Qi
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Ruixin Yang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Xueqin Chen
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Zixuan Chen
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Jun-Jie Zhu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
- Shenzhen Research Institute of Nanjing University, Shenzhen 518000, People's Republic of China
| |
Collapse
|
2
|
Programmable, Universal DNAzyme Amplifier Supporting Pancreatic Cancer-Related miRNAs Detection. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10070276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The abnormal expression of miRNA is closely related to the occurrence of pancreatic cancer. Herein, a programmable DNAzyme amplifier for the universal detection of pancreatic cancer-related miRNAs was proposed based on its programmability through the rational design of sequences. The fluorescence signal recovery of the DNAzyme amplifier showed a good linear relationship with the concentration of miR-10b in the range of 10–60 nM, with a detection limit of 893 pM. At the same time, this method displayed a high selectivity for miR-10b, with a remarkable discrimination of a single nucleotide difference. Furthermore, this method was also successfully used to detect miR-21 in the range of 10–60 nM based on the programmability of the DNA amplifier, exhibiting the universal application feasibility of this design. Overall, the proposed programmable DNAzyme cycle amplifier strategy shows promising potential for the simple, rapid, and universal detection of pancreatic cancer-related miRNAs, which is significant for improving the accuracy of pancreatic cancer diagnosis.
Collapse
|
3
|
Li C, Wang Z, Jiang Z. Ferrocene-Doped Polystyrene Nanoenzyme and DNAzyme Cocatalytic SERS Quantitative Assay of Ultratrace Pb2+. NANOMATERIALS 2022; 12:nano12081243. [PMID: 35457951 PMCID: PMC9027246 DOI: 10.3390/nano12081243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 12/02/2022]
Abstract
A new, stable and high-catalytic activity ferrocene-doped polystyrene nanosphere (PNFer) sol was prepared by the hydrogel procedure and characterized by electron microscopy and molecular spectroscopy. Results show that the nanosol exhibits excellent catalysis of the new indicator nanoreaction between AgNO3 and sodium formate to generate nanosilver with strong surface-enhanced Raman scattering (SERS), resonance Rayleigh scattering (RRS) and surface plasmon resonance absorption (Abs) trimode molecular spectral signals. This new nanocatalytic amplification trimode indicator reaction was coupled with the G-quadruplex DNAzyme catalytic amplification of Pb2+ aptamer to fabricate a new SERS quantitative/RRS/Abs assay platform for the determination of ultratrace amounts of Pb2+. The Pb2+ content in water samples was analyzed with satisfactory results.
Collapse
Affiliation(s)
- Chongning Li
- School of Public Health, Guilin Medical University, Guilin 541199, China; (C.L.); (Z.W.)
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541006, China
| | - Zhenghong Wang
- School of Public Health, Guilin Medical University, Guilin 541199, China; (C.L.); (Z.W.)
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541006, China
| | - Zhiliang Jiang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541006, China
- Correspondence:
| |
Collapse
|
4
|
Xu Y, He P, Ahmad W, Hassan MM, Ali S, Li H, Chen Q. Catalytic hairpin activated gold-magnetic/gold-core-silver-shell rapid self-assembly for ultrasensitive Staphylococcus aureus sensing via PDMS-based SERS platform. Biosens Bioelectron 2022; 209:114240. [PMID: 35447597 DOI: 10.1016/j.bios.2022.114240] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 03/20/2022] [Accepted: 03/31/2022] [Indexed: 11/02/2022]
Abstract
Staphylococcus aureus (S. aureus) has been identified as a marker of food contamination, closely associated with human health. This work designs a sensitive and rapid bio-detection strategy for S. aureus based on hybridization chain reaction-assisted surface enhanced Raman scattering (HCR-assisted-SERS) signal amplification. In this approach, the interaction between the aptamer (Apt) and its partial complementary DNA strands (cDNA) fabricated on the surface of gold-assisted magnetic nanoparticles (Au-MNPs) and the subsequent detachment of the cDNA results in the activation of the HCR process. In the HCR, a pair of hairpin structured DNA probes (H1 and H2) with sticky ends self-assembles to form a long DNA polymer. Subsequently, the output and amplification of the SERS signal were performed by conjugating 4-ATP modified Au@Ag NPs with the obtained DNA polymer via a specific Ag-S bond, and further collected through a self-administered polydimethylsiloxane (PDMS) cone-shaped support array. The precise quantification of S. aureus was performed in the concentration range of 28 to 2.8 × 106 cfu/mL, achieving a detection limit of 0.25 cfu/mL. This strategy was further applied to S. aureus detection in spiked milk samples with good recoveries (91-102%) and the relative standard deviation (4.35-8.41%). The sensing platform also showed satisfactory validation results (p > 0.05) using the traditional plate counting method. The proposed HCR-assisted SERS probe can be extended to other foodborne pathogenic bacteria types via engineering appropriate Apt and DNA initiators, thus, inspiring widespread applications in food safety and biomedical research.
Collapse
Affiliation(s)
- Yi Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Peihuan He
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Waqas Ahmad
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Md Mehedi Hassan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Shujat Ali
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, 325035, People's Republic of China
| | - Huanhuan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China.
| | - Quansheng Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China; College of Food and Biological Engineering, Jimei University, Xiamen, 361021, People's Republic of China.
| |
Collapse
|
5
|
Applications of hybridization chain reaction optical detection incorporating nanomaterials: A review. Anal Chim Acta 2022; 1190:338930. [PMID: 34857127 DOI: 10.1016/j.aca.2021.338930] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 12/13/2022]
Abstract
The development of powerful, simple and cost-effective signal amplifiers has significant implications for biological research and analysis. Hybridization chain reaction (HCR) has attracted increasing attention because of its enzyme-free, simple, and efficient amplification. In the HCR process, an initiator probe triggered a pair of metastable hairpins through a cross-opening process to propagate a chain reaction of hybridization events, yielding a long-nicked double-stranded nucleic acid structure. To achieve more noticeable signal amplification, nanomaterials, including graphene oxide, quantum dots, gold, silver, magnetic, and other nanoparticles, were integrated with HCR. Various types of colorimetric, fluorescence, plasmonic analyses or chemiluminescence optical sensing strategies incorporating nanomaterials have been developed to analyze various targets, such as nucleic acids, small biomolecules, proteins, and metal ions. This review summarized the recent advances of HCR technology pairing diverse nanomaterials in optical detection and discussed their challenges.
Collapse
|
6
|
From lab to field: Surface-enhanced Raman scattering-based sensing strategies for on-site analysis. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2021.116488] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
7
|
Yuan C, Fang J, de la Chapelle ML, Zhang Y, Zeng X, Huang G, Yang X, Fu W. Surface-enhanced Raman scattering inspired by programmable nucleic acid isothermal amplification technology. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
8
|
Abstract
This article provides a comprehensive review of biosensing with DNAzymes, providing an overview of different sensing applications while highlighting major progress and seminal contributions to the field of portable biosensor devices and point-of-care diagnostics. Specifically, the field of functional nucleic acids is introduced, with a specific focus on DNAzymes. The incorporation of DNAzymes into bioassays is then described, followed by a detailed overview of recent advances in the development of in vivo sensing platforms and portable sensors incorporating DNAzymes for molecular recognition. Finally, a critical perspective on the field, and a summary of where DNAzyme-based devices may make the biggest impact are provided.
Collapse
Affiliation(s)
- Erin M McConnell
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada.
| | | | | | | | | | | |
Collapse
|
9
|
Niu Y, Chen Y, Zhang X, Xie H, Luo G, Sun W. Photoelectrochemical biosensor for lead ion determination based on complementary strand aptamers. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yanyan Niu
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| | - Yuxue Chen
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| | - Xiaoping Zhang
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| | - Hui Xie
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| | - Guiling Luo
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| | - Wei Sun
- China Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering Hainan Normal University Haikou China
| |
Collapse
|
10
|
Zhou C, Pan Y, Ge S, Coulon F, Yang Z. Rapid methods for antimicrobial resistance diagnosis in contaminated soils for effective remediation strategy. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116203] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
11
|
Wu H, Wang S, Li SFY, Bao Q, Xu Q. A label-free lead(II) ion sensor based on surface plasmon resonance and DNAzyme-gold nanoparticle conjugates. Anal Bioanal Chem 2020; 412:7525-7533. [PMID: 32829439 DOI: 10.1007/s00216-020-02887-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/06/2020] [Accepted: 08/14/2020] [Indexed: 02/07/2023]
Abstract
Detection of lead(II) (Pb2+) ions in water is important for the protection of human health and environment. The growing demand for onsite detection still faces challenges for sensitive and easy-to-use methods. In this work, a novel surface plasmon resonance (SPR) biosensor based on GR-5 DNAzyme and gold nanoparticles (AuNPs) was developed. Thiolated DNAzyme was immobilized on the gold surface of the sensor chip followed by anchoring the substrate-functionalized AuNPs through the DNAzyme-substrate hybridization. The coupling between the localized surface plasmon (LSP) of AuNPs and the surface plasmon polaritons (SPP) on the gold sensor surface was used to improve the sensitivity. The substrate cleavage in the presence of Pb2+ ions was catalyzed by DNAzyme, leading to the removal of AuNPs and the diminished LSP-SPP coupling. The optimal detection limit was 80 pM for the sensor fabricated with 1 μM DNAzyme, corresponding to two or three orders of magnitude lower than the toxicity levels of Pb2+ in drinking water defined by WHO and USEPA. By tuning the surface coverage of DNAzyme, the sensitivity and dynamic range could be controlled. This sensor also featured high selectivity to Pb2+ ions and simple detection procedure. Successful detection of Pb2+ ions in groundwater indicates that this method has the prospect in the onsite detection of Pb2+ ions in water. Given the variety of AuNPs and metal-specific DNAzymes, this detection strategy would lead to the development of more sensitive and versatile heavy metal sensors. Graphical abstract.
Collapse
Affiliation(s)
- Huanan Wu
- Shenzhen Engineering Laboratory for Eco-Efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Shuokang Wang
- Shenzhen Engineering Laboratory for Eco-Efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Sam Fong Yau Li
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Qi Bao
- Shenzhen Engineering Laboratory for Eco-Efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China
| | - Qiyong Xu
- Shenzhen Engineering Laboratory for Eco-Efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, Guangdong, China.
| |
Collapse
|
12
|
Xu W, Zhao A, Zuo F, Khan R, Hussain HMJ, Li J. A highly sensitive DNAzyme-based SERS biosensor for quantitative detection of lead ions in human serum. Anal Bioanal Chem 2020; 412:4565-4574. [DOI: 10.1007/s00216-020-02709-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 05/07/2020] [Accepted: 05/13/2020] [Indexed: 02/03/2023]
|
13
|
Yan Y, Ma C, Tang Z, Chen M, Zhao H. A novel fluorescent assay based on DNAzyme-assisted detection of prostate specific antigen for signal amplification. Anal Chim Acta 2020; 1104:172-179. [PMID: 32106949 DOI: 10.1016/j.aca.2020.01.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 11/23/2019] [Accepted: 01/07/2020] [Indexed: 12/13/2022]
Abstract
Prostate specific antigen (PSA) is one of the most common biomarkers for the management of prostate cancer. However, it still remains urgent to develop highly sensitive, cost-effective and selective strategies for PSA assay. In this paper, we developed a low-cost, highly sensitive and specific analytical strategy for the detection of PSA by using a fluorescence sensor based on Pb2+-dependent DNAzyme. We designed a DNA sequence called cmMB with a hairpin structure, containing PSA-specific aptamers and Pb2+-dependent DNAzyme chains. Also, a fluorophore-labelled DNA sequence called Sub-FAM, which contains a cleavage site of Pb2+-dependent DNAzyme and serves as substrate, is also designed for the signal generation. In the presence of PSA, interaction between aptamer and PSA blocks the hairpin structure of cmMB, resulting in the formation of Pb2+-dependent DNAzyme with Pb2+. Then, Pb2+-dependent DNAzyme can cleavage Sub-FAM and produce a high fluorescence. In the absence of PSA, since Sub-FAM remains to be ssDNA and can be absorbed by GO, only low fluorescence can be detected. Under optimal experimental conditions, a good linear relationship in the range of 1-100 pg mL-1 was exhibited, with a limit of detection (LOD) of 0.76 pg mL-1. In addition, the proposed method has potential value in the diagnosis and monitoring of prostate cancer because of its good selectivity and practical application in biological samples.
Collapse
Affiliation(s)
- Ying Yan
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Changbei Ma
- School of Life Sciences, Central South University, Changsha, 410013, China.
| | - Zhenwei Tang
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Mingjian Chen
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Han Zhao
- School of Life Sciences, Central South University, Changsha, 410013, China
| |
Collapse
|
14
|
Ultrasensitive SERS determination of avian influenza A H7N9 virus via exonuclease III-assisted cycling amplification. Talanta 2019; 205:120137. [DOI: 10.1016/j.talanta.2019.120137] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 07/02/2019] [Accepted: 07/08/2019] [Indexed: 01/22/2023]
|
15
|
Aloisi A, Della Torre A, De Benedetto A, Rinaldi R. Bio-Recognition in Spectroscopy-Based Biosensors for *Heavy Metals-Water and Waterborne Contamination Analysis. BIOSENSORS 2019; 9:E96. [PMID: 31366137 PMCID: PMC6784378 DOI: 10.3390/bios9030096] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/23/2019] [Accepted: 07/25/2019] [Indexed: 02/07/2023]
Abstract
: Microsystems and biomolecules integration as well multiplexing determinations are key aspects of sensing devices in the field of heavy metal contamination monitoring. The present review collects the most relevant information about optical biosensors development in the last decade. Focus is put on analytical characteristics and applications that are dependent on: (i) Signal transduction method (luminescence, colorimetry, evanescent wave (EW), surface-enhanced Raman spectroscopy (SERS), Förster resonance energy transfer (FRET), surface plasmon resonance (SPR)); (ii) biorecognition molecules employed (proteins, nucleic acids, aptamers, and enzymes). The biosensing systems applied (or applicable) to water and milk samples will be considered for a comparative analysis, with an emphasis on water as the primary source of possible contamination along the food chain.
Collapse
Affiliation(s)
- Alessandra Aloisi
- Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, 73100 Lecce, Italy
| | - Antonio Della Torre
- Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, 73100 Lecce, Italy
| | - Angelantonio De Benedetto
- Mathematics and Physics "E. De Giorgi" Department, University of Salento, Via Monteroni, 73100 Lecce, Italy
| | - Rosaria Rinaldi
- Institute for Microelectronics and Microsystems (IMM), CNR, Via Monteroni, 73100 Lecce, Italy.
- Mathematics and Physics "E. De Giorgi" Department, University of Salento, Via Monteroni, 73100 Lecce, Italy.
- ISUFI, University of Salento, Via Monteroni, 73100 Lecce, Italy.
| |
Collapse
|
16
|
A new impedimetric sensor based on anionic intercalator for detection of lead ions with low cost and high sensitivity. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.09.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
17
|
Sigel A, Operschall BP, Sigel RKO, Sigel H. Metal ion complexes of nucleoside phosphorothioates reflecting the ambivalent properties of lead(ii). NEW J CHEM 2018. [DOI: 10.1039/c7nj04989g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The lead(ii)-lone pair leads to ambivalency: hemidirected (distorted, non-spherical) coordination spheres result from electronegative O-coordination and holodirected (symmetric, spherical) ones from less electronegative S-coordination.
Collapse
Affiliation(s)
- Astrid Sigel
- Department of Chemistry
- Inorganic Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Bert P. Operschall
- Department of Chemistry
- Inorganic Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | | | - Helmut Sigel
- Department of Chemistry
- Inorganic Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| |
Collapse
|