Compilation and evaluation of diffusivities from Compilation and evaluation of gas phase diffusion coefficients of halogenated organic compounds

Gu_Tables_ES

Use HypE to Hide Association Rules by Adding Items

<div><p>During business collaboration, partners may benefit through sharing data. People may use data mining tools to discover useful relationships from shared data. However, some relationships are sensitive to the data owners and they hope to conceal them before sharing. In this paper, we address this problem in forms of association rule hiding. A hiding method based on evolutionary multi-objective optimization (EMO) is proposed, which performs the hiding task by selectively inserting items into the database to decrease the confidence of sensitive rules below specified thresholds. The side effects generated during the hiding process are taken as optimization goals to be minimized. HypE, a recently proposed EMO algorithm, is utilized to identify promising transactions for modification to minimize side effects. Results on real datasets demonstrate that the proposed method can effectively perform sanitization with fewer damages to the non-sensitive knowledge in most cases.</p></div

Tradeoffs exist within different side effects.

<p>Tradeoffs exist within different side effects.</p

The shuffle crossover.

<p>The shuffle crossover.</p

Characteristics of real datsets and parameter settings.

<p>Characteristics of real datsets and parameter settings.</p

The mechanism of chromosome encoding.

<p>The mechanism of chromosome encoding.</p

Side effects with increasing <i>MCT</i> levels.

<p>Side effects with increasing <i>MCT</i> levels.</p

Highly Selective Luminescent Sensing of Fluoride and Organic Small-Molecule Pollutants Based on Novel Lanthanide Metal–Organic Frameworks

Two novel isostructural lanthanide metal–organic frameworks (Ln-MOFs), [Ln₂(BPDC)­(BDC)₂(H₂O)₂]_<i>n</i> (Ln = Eu (<b>1</b>) and Tb (<b>2</b>)), have been successfully synthesized via a mixed ligand approach using 2,2′-bipyridine-3,3′-dicarboxylic acid (H₂BPDC) and 1,4-benzenedicarboxylic acid (H₂BDC) under hydrothermal conditions. Structural analysis shows that two lanthanide ions are 4-fold linked by two κ¹-κ¹-μ₂ carboxylates from BDC^2– and the other two κ²-κ¹-μ₂ carboxylates from BPDC^2– to form a binuclear core. The binuclear units are further connected by BDC^2– and BPDC^2– to build a three-dimensional framework possessing <b>tfz-d</b> topology with the short (Schläfli) vertex symbol {4³}₂{4⁶·6¹⁸·8⁴}. Moreover, isostructural doped Ln-MOFs [Eu_2<i>x</i>Tb_{2(1–<i>x</i>)}(BPDC)­(BDC)₂(H₂O)₂]_<i>n</i> (<i>x</i> = 0.1 (<b>1a</b>), 0.3 (<b>1b</b>), 0.5 (<b>1c</b>), 0.7 (<b>1d</b>), and 0.9 (<b>1e</b>)) were also successfully synthesized. Thermal gravimetric analyses (TGA) reveal high thermal stability of these Ln-MOFs. Luminescent measurements indicate that the characteristic sharp emission bands of Eu³⁺ and Tb³⁺ ions are simultaneously observed in <b>1a</b>–<b>e</b>. Further luminescent studies reveal that <b>1</b>, <b>2</b>, and <b>1a</b> not only display a high-sensitivity sensing function with respect to fluoride but also exhibit significant solvent-dependent luminescent response to small-molecule pollutants, such as formaldehyde, acetonitrile, and acetone

Ultrastrong Alkali-Resisting Lanthanide-Zeolites Assembled by [Ln₆₀] Nanocages

Zeolites, as one of the most important porous materials, are most widely utilized in sorbents, catalysis, and ion-exchange fields. However, the multi-functional lanthanide-zeolites constructed exclusively by lanthanide ions and oxygen linkers are to our knowledge unknown hitherto. Herein, we, for the first time, report the unique structure and multifunctions of lanthanide zeolites (<b>1·Gd</b>, <b>1·Tb</b>, <b>1·Dy</b>), featuring 60 nuclear [Ln₆₀] nanocages as building blocks and ultrastrong alkali-resisting. These compounds possess extremely high stability and still retain single crystallinity after treatment in boiling water, 0.1 M HCl, and 20 M NaOH aqueous solutions. Magnetic studies revealed <b>1·Gd</b> has large magnetocaloric effect with −Δ<i>S</i>_m^max = 66.5 J kg^–1 K^–1, falling among the largest values known to date. Importantly, these lanthanide-zeolites themselves can efficiently catalyze the cycloaddition of CO₂ with epoxides under mild conditions. Our finding extends the conventional zeolites to lanthanide counterparts, opening a new space for seeking novel and/or multifunctional zeolites

Transition-Metal-Triggered High-Efficiency Lithium Ion Storage via Coordination Interactions with Redox-Active Croconate in One-Dimensional Metal–Organic Anode Materials

Coordination polymers (CPs) have powerful competence as anode materials for lithium-ion batteries (LIBs) owing to their structural diversity, tunable functionality, and facile and mild synthetic conditions. Here, we show that two isostructural one-dimensional croconate-based CPs, namely, [M­(C₅O₅)­(H₂O)₃]<i>_n</i> (M = Mn for <b>1</b> and Co for <b>2</b>; C₅O₅^2– = croconate dianion), can work as high-performance electrode materials for rechargeable LIBs. By means of the coordination between the redox-active transition metal ion and the ligand, the anode materials were stable in the electrolyte and showed high capacities, impressive rate capabilities, and excellent cycling performance during the discharging/charging processes. The chain-based supramolecular structures of the CPs also make them stand out from a crowd of porous three-dimensional molecular materials due to their free channels between the chains for lithium ion diffusion. When tested in a voltage window of 0.01–2.4 V at 100 mA g^–1, CPs <b>1</b> and <b>2</b> demonstrated high discharge specific capacities of 729 and 741 mA h g^–1, respectively. The synergistical redox reactions on both metal centers and the organic moieties play a crucial role in the high electrochemical performance of CPs <b>1</b> and <b>2</b>. After undergoing elevated discharging/charging rates to 2 A g^–1, the electrodes could finally recover their capabilities as those in the initial stage when the current rate was back to 100 mA g^–1, indicating excellent rate performance and outstanding cycling stabilities of the materials