 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 2053 | 回復(fù): 9 | |||
| 當(dāng)前只顯示滿足指定條件的回帖，點擊這里查看本話題的所有回帖 | |||
zhangkun232至尊木蟲 (著名寫手)
|
[交流]
貴金屬納米團簇的分子發(fā)光機制 已有2人參與
|
||
|
金屬納米團簇的發(fā)光一直以來存在非常大的爭議，有兩個核心機制：貴金屬納米團簇的量子尺寸限域效應(yīng)和表面配體主導(dǎo)的空間電子效應(yīng)，越來越多的證據(jù)證明表面配體對發(fā)光的調(diào)控起到?jīng)Q定性作用，但是發(fā)光的中心是表面的保護性配體還是其它吸附的化學(xué)組分。結(jié)合各種穩(wěn)態(tài)譜學(xué)以及飛秒超快技術(shù)，我們在國際上率先提出了，貴金屬納米團簇的發(fā)光中心來源于界面吸附的結(jié)構(gòu)水分子，這正結(jié)構(gòu)水分子不同于傳統(tǒng)的氫鍵水分子，并且提出了拓?fù)浼ぐl(fā)的概念。論文發(fā)表在Nanoscale（Nanoscale, 2021,13, 15058-15066；DOI https://doi.org/10.1039/D1NR02389F）上，歡迎大家留言討論。文章鏈接如下：https://pubs.rsc.org/en/content/articlelanding/2021/nr/d1nr02389f Caged structural water molecules emit tunable brighter colors by topological excitation† bstract Intrinsically, free water molecules are a colourless liquid. If it is colourful, why and how does it emit the bright colours? We provided direct evidence that when water was trapped into the sub-nanospace of zeolites, the structural water molecules (SWs) exhibited strong tunable photoluminescence (PL) emissions from blue to red colours with unprecedented ultra-long lifetimes up to the second scale at liquid nitrogen temperature. Further controlled experiments and combined characterizations by time-resolved steady-state and ultra-fast femtosecond (fs) transient optical spectroscopy showed that the singly adsorbed hydrated hydroxide complex {OH−·H2O} as SWs in the confined nanocavity is the true emitter centre, whose PL efficiency strongly depends on the type and stability of the SWs, which is dominated by H-bond interactions, such as the solvent effect, pH value and operating temperature. The emission of SWs exhibits the characteristic of topological excitations (TAs) due to the many-body quantum electron correlations in confined nanocavities, which differs from the local excitation of organic chromophores. Our model not only elucidates the origin of the PL of metal nanoclusters (NCs), but also provides a completely new insight to understand the nature of heterogeneous catalysis and interface bonding (or state) at the molecule level, beyond the metal-centred d band theory. |
回復(fù)此樓» 猜你喜歡
XPS/?λXPS
已經(jīng)有0人回復(fù)
-
河北大學(xué)-26年秋季入學(xué)化學(xué)博士招生
已經(jīng)有0人回復(fù)
-
金屬材料論文潤色/翻譯怎么收費?
已經(jīng)有216人回復(fù)
-
招收2026年入學(xué)博士研究生
已經(jīng)有10人回復(fù)
-
0856材料306分調(diào)劑
已經(jīng)有2人回復(fù)
-
考研復(fù)試調(diào)劑，過國家線的同學(xué)都可報名（化學(xué)相關(guān)專業(yè)）
已經(jīng)有0人回復(fù)
» 本主題相關(guān)商家推薦: (我也要在這里推廣)
zhangkun232
至尊木蟲 (著名寫手)
- 應(yīng)助: 24 (小學(xué)生)
- 金幣: 24096.9
- 散金: 6
- 紅花: 7
- 帖子: 2714
- 在線: 236.3小時
- 蟲號: 374725
- 注冊: 2007-05-18
- 性別: GG
- 專業(yè): 催化化學(xué)
8樓2022-04-19 10:01:12
zhangkun232
至尊木蟲 (著名寫手)
- 應(yīng)助: 24 (小學(xué)生)
- 金幣: 24096.9
- 散金: 6
- 紅花: 7
- 帖子: 2714
- 在線: 236.3小時
- 蟲號: 374725
- 注冊: 2007-05-18
- 性別: GG
- 專業(yè): 催化化學(xué)
2樓2021-09-19 21:22:48
willbuilder
鐵桿木蟲 (著名寫手)
- 應(yīng)助: 12 (小學(xué)生)
- 金幣: 6760.6
- 散金: 331
- 紅花: 12
- 帖子: 2309
- 在線: 911.5小時
- 蟲號: 460811
- 注冊: 2007-11-17
- 性別: GG
- 專業(yè): 光學(xué)和光電子材料
3樓2021-09-21 07:06:26
zhangkun232
至尊木蟲 (著名寫手)
- 應(yīng)助: 24 (小學(xué)生)
- 金幣: 24096.9
- 散金: 6
- 紅花: 7
- 帖子: 2714
- 在線: 236.3小時
- 蟲號: 374725
- 注冊: 2007-05-18
- 性別: GG
- 專業(yè): 催化化學(xué)
|
最新的研究進展，尤其是關(guān)于雙金屬納米團簇的發(fā)光機制：鏈接如下： https://www.frontiersin.org/arti ... em.2021.756993/full |
4樓2021-09-27 18:51:31
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿314求調(diào)劑 +5 | 202111120625 2026-03-03 | 5/250 |
|
|---|---|---|---|---|
|
[考研] 學(xué)碩材料275調(diào)劑 +7 | 路三三 2026-03-03 | 7/350 |
|
|
|
[考研] 0703化學(xué)調(diào)劑 +4 | G212 2026-03-03 | 5/250 |
|
|
|
[考研] 求調(diào)劑院校 +6 | 云朵452 2026-03-02 | 11/550 |
|
|
|
[考研]
 0703化學(xué)學(xué)碩 288分
+4
|
旅行中的紫葡萄 2026-03-03 | 4/200 |
|
|
|
[考研] 環(huán)境工程學(xué)碩288求助調(diào)劑 +7 | 多吃億口芝士 2026-03-02 | 7/350 |
|
|
|
[考研] 292求調(diào)劑 +3 | sgbl 2026-03-03 | 3/150 |
|
|
|
[基金申請] 沒有青基直接申請面上，感覺自己瘋了 +5 | kevin63t 2026-03-02 | 6/300 |
|
|
|
[考研] 一志愿華中科技大學(xué)，化學(xué)專業(yè)344分，求調(diào)劑 +6 | 邢xing1 2026-03-02 | 6/300 |
|
|
|
[考研] 26考研報考西工大材料308分求調(diào)劑 +4 | weizhong123 2026-03-01 | 5/250 |
|
|
|
[考研] 課題組接收材料類調(diào)劑研究生 +6 | gaoxiaoniuma 2026-02-28 | 9/450 |
|
|
|
[考研] 清華大學(xué) 材料與化工 353分求調(diào)劑 +5 | awaystay 2026-03-02 | 6/300 |
|
|
|
[考研] 11408，學(xué)碩276求調(diào)劑 +3 | 崔wj 2026-03-02 | 5/250 |
|
|
|
[考研] 290分材料工程085601求調(diào)劑 數(shù)二英一 +8 | llx0610 2026-03-02 | 9/450 |
|
|
|
[考研] 一志愿山東大學(xué)材料與化工325求調(diào)劑 +5 | 半截的詩0927 2026-03-02 | 5/250 |
|
|
|
[考研] 303求調(diào)劑 +5 | 今夏不夏 2026-03-01 | 5/250 |
|
|
|
[考博] 誠招農(nóng)業(yè)博士 +3 | 心欣向榮 2026-02-28 | 3/150 |
|
|
|
[考研] 292求調(diào)劑 +7 | yhk_819 2026-02-28 | 7/350 |
|
|
|
[考研] 275求調(diào)劑 +3 | L-xin? 2026-03-01 | 6/300 |
|
|
|
[考研] 328求調(diào)劑 +3 | aaadim 2026-03-01 | 5/250 |
|