A Green Chemistry Strategy: Fluorous Catalysis

Jiang, Zhong‐Xing; Li, Xuefei; Qing, Feng‐Ling

doi:10.1002/9783527675906.ch7

Cited by 2 publications

(2 citation statements)

References 53 publications

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“…Furthermore, another limitation of the study is the availability of certain data used and the unmatching periods of data collection for the two variables in comparison. The hard coral coverage data from Souter et al used for figure 5 recorded the regional change from 1978 to 2019 [15]; the surface ocean hydrogen activity measure from NCEI [26], on the other hand, recorded and predicted from the year 1970 to 2011 with a ten-year interval between each data point. The substantial difference in time periods and the relatively long intervals between surface ocean hydrogen ion activity measures result in fewer than three data points from the same year for the two variables to be compared.…”

Section: Discussionmentioning

confidence: 99%

Increasing impacts of ocean acidification on coral reefs under global warming

2024

TNS

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The rapid increase in atmospheric CO2 concentration in recent decades has influenced the marine system to a great extent with ocean acidification being one of the consequences. Ocean acidifications impact on calcifying marine organisms has long been the subject of scientific studies. To determine the effect of ocean acidification on hard coral reefs, we analyzed five ocean coastal regions, comparing the trend in regional surface hydrogen ion activity with the change in hard coral coverage. In each region, we included both historical measured data and predicted data using RCP models as an implication of the potential future. The outcome does not provide substantial evidence to confirm the hypothesis linking the two variables. Additionally, the direct association between these variables cannot be ascertained due to the influence of uncontrolled factors such as local pollution, ocean warming, and ocean currents.

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Section: Discussionmentioning

confidence: 99%

Increasing impacts of ocean acidification on coral reefs under global warming

2024

TNS

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“…A fluorous tag strategy of varying tag lengths has been successfully developed in fluorous solid phase (F-SP) separation/extraction, asymmetric catalysis, and synthetic applications of biomedicinal , and natural product interests. Therefore, we also sought to append a p -nona-fluoroheptoxy (NFH) tag at the tail of the vanadyl cluster complexes for their real time domain HPLC analyses with quantification (Figure B).…”

Section: Introductionmentioning

confidence: 99%

Metal-Ion Specific Recognition with Amplified Transcription from Subnanometer to Submillimeter or Real-Time Domain by Self-Assembled Vanadyl Quartets

Chen

Weng

2022

Inorg. Chem.

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Vanadyl(V) complexes 1 and 2 bearing a nematic liquid crystal (LC) like a p-heptoxyphenyl group or a fluorous-tag pnonafluoroheptoxyphenyl (NFH) group at the C5 position of the Nsalicylidene template were designed and synthesized. Each complex was subjected to MVO 3 -induced self-assembly to form metal-ion, encapsulated quartet clusters 3-M and 3′-M. The Na + in cluster complex 3-Na or 3′-Na can be readily replaced by Rb + , Ag + , or Hg 2+ in an aqueous layer to form cluster complexes by ion swapping at the H 2 O/CDCl 3 bilayer interface. Selectivity profiles were examined with alkali-metal ions, Ag + , and Hg 2+ through metal-ion competition experiments. The 3′-Na has an exclusive selectivity for Hg 2+ in the presence of Zn 2+ and Cd 2+ . Cluster complexes 3-M were utilized as chiral dopants to nematic LC materials. The effects of the encapsulated metal ions within the alkali family and Ag + on Cano's line widths and helical pitch changes were viewed in wedge cells under a polarized microscope. Their correlations with the ionic radius were identified. The subnano information of the metal ions can thus be asymmetrically amplified to Cano's line spacings of the submilimeter domain. Conversely, the effects of the encapsulated alkali metal ions and Hg 2+ in 3′-M on the interactions of their NFH tails toward fluorous silica gel (FSG) were performed via HPLC analyses. Their retention times became longer as the sizes of encapsulated, alkali metal ions increased. The increasing ion size from Na + to Cs + caused the four lower rim NFH tags of the cluster to be closer due to reduced cone angles. Their interactions among NFH tail groups on FSG became larger, thus leading to distinctive separations with t R from 7.36 to 10.27 min. The retention time difference between 3′-Na and 3′-Hg on HPLC was ∼3.6 min, resulting in discernible separation. The individual ion size differences on the subnano scale can thus be amplified and unambiguously established in the real time domain.

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A Green Chemistry Strategy: Fluorous Catalysis

Cited by 2 publications

References 53 publications

Increasing impacts of ocean acidification on coral reefs under global warming

Increasing impacts of ocean acidification on coral reefs under global warming

Metal-Ion Specific Recognition with Amplified Transcription from Subnanometer to Submillimeter or Real-Time Domain by Self-Assembled Vanadyl Quartets

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