Study on the Relationship between Structure of Supramolecular Ion Material and Performance of Humidity Sensing

相对湿度是许多领域的关键参数，环境湿度与人们的生活密切相关，因此对湿度进行测量和控制是各个领域中值得关注的问题之一. 在前期的研究中，作者制备了一种新型的超分子离子材料（SIM），它是由基于咪唑的双阳离子（如1,10-双（3-甲基咪唑-1-基）癸烷，C10(mim)2）和电活性二阴离子（如2,2\'-连氮基-双（3-乙基苯并噻唑啉-6-磺酸），ABTS）组成的，发现其对湿度具有敏感且快速的响应. 在此基础上，本文制备了6种不同碳链（C4，C6，C8，C10，C12，C14）的咪唑基化合物，发现其中3种（C10，C12，C14）可与ABTS形成水稳定的SIM. 循环伏安法、计时电流法以及石英晶体微量天平表征了这些超分子离子材料的湿度传感性能，发现基于C12的SIM具有最佳的湿度传感性能. 同时，SEM结果显示随着碳链的增加，离子材料的厚度变薄并且形态变得不规则. 因此，作者认为疏水作用和材料比表面积均会影响湿度传感的灵敏度. 本研究为发展新的湿度响应的离子传感材料奠定了基础.Humidity measurement and control is one of the most notable issues in various areas, such as climate, industry, agriculture, electronics, especially human comfort and health. In our previous study, we have found that a new kind of supramolecular ionic material (SIM), consisting of an imidazolium-based dication (e.g., 1,10-bis(3-methylimidazolium-1-yl) decane, C10(mim)2) and electroactive dianionic (e.g., 2,2\'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid), ABTS), shows ultrasensitive and ultrafast response towards humidity sensing. Herein we prepared six kinds of imidazolium-based dications with different carbon chain lengths (i.e., C4, C6, C8, C10, C12, C14), and found that three of them (i.e., C10, C12, C14) could form water-stable SIM with ABTS. Cyclic voltammetry, chronoamperometry and quartz crystal microbalance were used to characterize the humidity sensing performance of these supramolecular ionic materials. The results show that the C12-based SIM has the best humidity sensing performance compared with the other two kinds of SIM. Moreover, SEM images show that the thickness of the ionic material became thinner with the increase of the carbon chain length. We, thus, conclude that both the hydrophobic interaction and the specific surface area of SIMs would contribute to the performance of humidity response. This paper would lay the foundation for the development of new ionic compound for humidity sensing.This research was supported by the National Natural Science Foundation of China (No. 21475138).作者联系地址：1. 湘潭大学化学学院，环境友好化学与应用教育部重点实验室，湖南 湘潭 411105；2. 北京分子科学国家实验室，中国科学院化学研究所活体分析化学重点实验室，北京 100190Author's Address: 1. Key Laboratory of Environmental Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China; 2. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China通讯作者E-mail：[email protected]

脑卒中后汉语失语症患者的言语和空间工作记忆障碍

目的探讨脑卒中后汉语失语症患者言语和空间工作记忆的损伤模式及其与语言损害的关系。方法研究纳入2012年10月至2018年6月期间中山大学附属第一医院收治的42例左侧半球卒中慢性期失语症患者，对照组选取42例人口学资料匹配的健康人群。收集受试者临床和影像学资料，采用数字广度顺向（DSF）和逆向（DSB）任务、空间广度顺向（SSF）和逆向（SSB）任务量表评估言语和空间工作记忆；西部失语症成套量表-修订版（WAB-R）评估语言功能并计算失语商（AQ）。采用组间、组内比较和线性混合效应模型分析患者的言语和空间工作记忆损害情况；利用偏相关分析控制人口学、病灶体积和认知功能因素，分析患者的言语和空间工作记忆与语言功能的相关性。结果患者组DSF、DSB、SSF和SSB任务分值低于对照组，差异有统计学意义（P<0.05）。线性混合效应模型分析结果显示，数字广度较空间广度任务受分组和任务版本的影响更大（P<0.001）。患者DSF、DSB和SSF评分与AQ分值呈正相关并有统计学意义（DSF： r=0.62， P<0.001； DSB： r=0.57， P<0.001； SSF： r=0.49， P=0.002）。进一步排除不同工作记忆任务的影响，患者DSF和DSB任务与AQ分值的相关性仍有统计学意义（DSF： r=0.53， P=0.001； DSB： r=0.42， P=0.01）。结论脑卒中后汉语失语症患者的言语和空间工作记忆均明显受损，言语工作记忆损害更为明显；工作记忆与语言功能残疾程度密切相关。该研究表明促进工作记忆恢复是改善脑卒中后语言功能的潜在途径

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^