亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Iodine Adsorption–Desorption-Induced Structural Transformation and Improved Ag+ Turn-On Luminescent Sensing Performance of a Nonporous Eu(III) Metal–Organic Framework

化学 发光 吸附 解吸 无定形固体 金属有机骨架 超分子化学 分子 多孔性 无机化学 猝灭(荧光) 化学工程 结晶学 荧光 物理化学 有机化学 材料科学 物理 光电子学 工程类 量子力学
作者
Chu-Hong Zhang,Bing-Xun Zhou,Xiao Lin,Yan Mo,Jian Cao,Song‐Liang Cai,Jun Fan,Wei‐Guang Zhang,Sheng‐Run Zheng
出处
期刊:Inorganic Chemistry [American Chemical Society]
卷期号:63 (9): 4185-4195 被引量:1
标识
DOI:10.1021/acs.inorgchem.3c04222
摘要

Posttreatment of pristine metal-organic frameworks (MOFs) with suitable vapor may be an effective way to regulate their structures and properties but has been less explored. Herein, we report an interesting example in which a crystalline nonporous Eu(III)-MOF was transferred to a porous amorphous MOF (aMOF) via iodine vapor adsorption-desorption posttreatment, and the resulting aMOF showed improved turn-on sensing properties with respect to Ag+ ions. The crystalline Eu-MOF, namely, Eu-IPDA, was assembled from Eu(III) and 4,4'-{4-[4-(1H-imidazol-1-yl)phenyl]pyridine-2,6-diyl}dibenzoic acid (H2IPDA) and exhibited a two-dimensional (2D) coordination network based on one-dimensional secondary building blocks. The close packing of the 2D networks gives rise to a three-dimensional supramolecular framework without any significant pores. Interestingly, the nonporous Eu-IPDA could absorb iodine molecules when Eu-IPDA crystals were placed in iodine vapor at 85 °C, and the adsorption capacity was 1.90 g/g, which is comparable to those of many MOFs with large BET surfaces. The adsorption of iodine is attributed to the strong interactions among the iodine molecule, the carboxy group, and the N-containing group and leads to the amorphization of the framework. After immersion of the iodine-loaded Eu-IPDA in EtOH, approximately 89.7% of the iodine was removed, resulting in a porous amorphous MOF, denoted as a-Eu-IPDA. In addition, the remaining iodine in the a-Eu-IPDA framework causes strong luminescent quenching in the fluorescence emission region of the Eu(III) center when compared with that in Eu-IPDA. The luminescence intensity of a-Eu-IPDA in water suspensions was significantly enhanced when Ag+ ions were added, with a detection limit of 4.76 × 10-6 M, which is 1000 times that of pristine Eu-IPDA. It also showed strong anti-interference ability over many common competitive metal ions and has the potential to sense Ag+ in natural water bodies and traditional Chinese medicine preparations. A mechanistic study showed that the interactions between Ag+ and the absorbed iodine, the carboxylate group, and the N atoms all contribute to the sensing performance of a-Eu-IPDA.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
9秒前
14秒前
16秒前
Akim应助无私寄风采纳,获得30
17秒前
30秒前
归海梦岚完成签到,获得积分0
33秒前
自由的梦露完成签到 ,获得积分10
34秒前
Huang发布了新的文献求助10
36秒前
Magali应助科研通管家采纳,获得20
37秒前
在水一方应助傢誠采纳,获得10
1分钟前
LiChard完成签到 ,获得积分10
1分钟前
Rin发布了新的文献求助10
1分钟前
汉堡包应助害羞的紫伊采纳,获得10
1分钟前
哈哈哈哈完成签到 ,获得积分10
1分钟前
Rin完成签到,获得积分10
1分钟前
赫连涵柏完成签到,获得积分0
1分钟前
Beata完成签到 ,获得积分10
2分钟前
科研混子完成签到 ,获得积分10
2分钟前
馅饼完成签到,获得积分10
2分钟前
2分钟前
2分钟前
吕懿发布了新的文献求助10
2分钟前
852应助吕懿采纳,获得10
2分钟前
叨叨不叨叨叨叨叨完成签到,获得积分10
2分钟前
这个手刹不太灵完成签到 ,获得积分10
2分钟前
清爽的绫完成签到,获得积分10
3分钟前
3分钟前
3分钟前
Jonas完成签到,获得积分10
3分钟前
害羞的紫伊完成签到 ,获得积分20
3分钟前
科研通AI2S应助鲸落采纳,获得10
3分钟前
3分钟前
鲸落发布了新的文献求助10
3分钟前
3分钟前
傢誠发布了新的文献求助10
3分钟前
sp完成签到,获得积分10
3分钟前
傢誠完成签到,获得积分10
3分钟前
信封完成签到 ,获得积分10
4分钟前
asaki完成签到,获得积分10
4分钟前
LingEcho应助Grace采纳,获得10
4分钟前
高分求助中
Un calendrier babylonien des travaux, des signes et des mois: Séries iqqur îpuš 1036
Sustainable Land Management: Strategies to Cope with the Marginalisation of Agriculture 1000
Corrosion and Oxygen Control 600
Heterocyclic Stilbene and Bibenzyl Derivatives in Liverworts: Distribution, Structures, Total Synthesis and Biological Activity 500
重庆市新能源汽车产业大数据招商指南(两链两图两池两库两平台两清单两报告) 400
Division and square root. Digit-recurrence algorithms and implementations 400
行動データの計算論モデリング 強化学習モデルを例として 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 有机化学 工程类 生物化学 纳米技术 物理 内科学 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 电极 光电子学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 2545356
求助须知:如何正确求助?哪些是违规求助? 2175631
关于积分的说明 5600135
捐赠科研通 1896314
什么是DOI,文献DOI怎么找? 946215
版权声明 565334
科研通“疑难数据库(出版商)”最低求助积分说明 503552