Size-dependent fluorescence properties of [n]cycloparaphenylenes (n = 8–13), hoop-shaped π-conjugated molecules
文献信息
Mamoru Fujitsuka, Takahiro Iwamoto, Shigeru Yamago, Tetsuro Majima
Hoop-shaped π-conjugated molecules such as cycloparaphenylene (CPP) have attracted the attention of many chemists because they exhibit interesting properties due to the distorted π-electron system. To gain a systematic understanding of the properties that result from distorted π-electron systems, it is important to know precisely how these properties depend on the hoop size. In the present study, we have investigated the size dependence of the fluorescence properties of CPPs. The fluorescence spectra of smaller CPPs showed red-shifted fluorescence peaks, smaller fluorescence quantum yields, and longer lifetimes, when compared to those of larger ones. One of the important factors that gave rise to these fluorescence properties of smaller CPPs was greater structural relaxation from the Franck–Condon state, which is a postulation supported by theoretical calculations. The structural relaxation in the picosecond domain was experimentally detected by the fluorescence upconversion method. The present results are an important example that confirms steric factors strongly governing the fluorescence properties of a molecule.
相关文献
On the fractality of the Freundlich adsorption isotherm in equilibrium and non-equilibrium cases
Przemysław Borys, Zbigniew J. Grzywna
DOI: 10.1039/C6CP03356C
Fluorescence fluctuation of an antigen–antibody complex: circular dichroism, FCS and smFRET of enhanced GFP and its antibody
Debmalya Bhunia, Rajdeep Chowdhury, Kankan Bhattacharyya
DOI: 10.1039/C5CP04908C
Electron–vibration entanglement in the Born–Oppenheimer description of chemical reactions and spectroscopy
Ross H. McKenzie
DOI: 10.1039/C5CP02239H
The thermoelectrochemistry of lithium–glyme solvate ionic liquids: towards waste heat harvesting
Jeffrey J. Black, Thomas Murphy, Rob Atkin, Andrew Dolan, Leigh Aldous
DOI: 10.1039/C6CP02255C
Comparison of biological chromophores: photophysical properties of cyanophenylalanine derivatives
Joshua P. Martin, Natalie R. Fetto, Matthew J. Tucker
DOI: 10.1039/C6CP04154J
Photodissociation of aniline N–H bonds in clusters of different nature
Viktoriya Poterya, Dana Nachtigallová, Jozef Lengyel, Michal Fárník
DOI: 10.1039/C5CP04485E
Ion-specific adsorption and electroosmosis in charged amorphous porous silica
Bertrand Siboulet, Jean-François Dufrêche
DOI: 10.1039/C5CP03818A
Water adsorption in SAPO-34: elucidating the role of local heterogeneities and defects using dispersion-corrected DFT calculations
DOI: 10.1039/C5CP04189A
Divergent trend in density versus viscosity of ionic liquid/water mixtures: a molecular view from guanidinium ionic liquids
Ramesh L. Gardas, Sanjib Senapati
DOI: 10.1039/C5CP02841H
Chain length, temperature and solvent effects on the structural properties of α-aminoisobutyric acid homooligopeptides
Sonja Grubišić
DOI: 10.1039/C6CP01120A
您可能还喜欢
如何储存8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯(CAS号:1072944-81-0)?
8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯应储存在阴凉、干燥的地方,避免光照和高温。建议使用密封容器进行储存,以防止水分和空气的影响。
2,2-二(2-呋喃基)丙烷(CAS号:17920-88-6)的市场或研究趋势如何?
2,2-二(2-呋喃基)丙烷的研究趋势主要集中在新型材料的开发和应用,如高分子材料、有机光电材料等。市场趋势方面,随着环保要求的提高和新材料的应用,该化合物的需...
如何处理含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐(CAS号:475152-31-9)的废料?
对于含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐的废料,应首先进行分类和分离,以减少危险物质的数量。随后,可以考虑通过化学氧化、生物...
Cinnamyl 3-aminobut-2-enoate(CAS号:113898-97-8)安全吗?
Cinnamyl 3-氨基丁-2-烯酸在接触皮肤和眼睛时可能会引起刺激。应避免吸入其粉尘和烟雾。操作时应穿戴适当的个人防护装备,如手套、护目镜和实验室外套。
反式-2-十二碳烯二酸(CAS号:6402-36-4)的市场或研究趋势如何?
反式-2-十二碳烯二酸在医药、材料科学等领域有一定的应用,但其市场相对较小。近年来,由于环保意识的提升,对环境友好型化学品的需求增加,研究倾向于开发更绿色的合成...
什么是(9ci)-1H-苯并咪唑-5-乙酸(CAS号:473895-86-2)?
(9ci)-1H-苯并咪唑-5-乙酸是一种含氮杂环化合物,其化学结构为1H-苯并咪唑-5-乙酸。该化合物具有特定的分子式C8H7NO2,属于有机酸类化合物。
酞菁蓝(CAS号:147-14-8)的主要用途是什么?
酞菁蓝主要用作颜料和染料,广泛应用于塑料、油墨、涂料、纺织品及橡胶工业中。它也用于光敏材料,如太阳能电池和光刻胶。在医疗领域,酞菁蓝因其光敏特性被用于某些光动力...
5-甲基-1,2,3,4-四氢异喹啉(CAS号:123593-99-7)安全吗?
5-甲基-1,2,3,4-四氢异喹啉在使用和储存时需要谨慎处理。它具有一定的毒性,应避免吸入其蒸气或直接接触皮肤和眼睛。操作此化合物时,建议佩戴防护眼镜、实验服...
如何处理含有3',4',5'-三甲氧基苯乙酮(CAS号:1136-86-3)的废料?
含有3',4',5'-三甲氧基苯乙酮的废液应首先确保其是否为危险废物,根据当地法规确定处理方法。通常,这类有机废液可以采用中和反应降低其pH值,然后通过蒸馏或萃...
如何储存KI-7(CAS号:1489263-00-4)?
KI-7应储存在通风良好的干燥环境中,避免光照和高温。建议使用密封容器储存,并保持在阴凉处。储存温度应控制在室温范围内,一般建议不超过25°C。避免与氧化剂接触...
来源期刊
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.












![[3-(2,6-Dichlorophenyl)-5-isopropyl-1,2-oxazol-4-yl]methanol structure [3-(2,6-Dichlorophenyl)-5-isopropyl-1,2-oxazol-4-yl]methanol structure](https://cnstatic.chemtradehub.com/structs/278/278597-30-1-5c79.webp)

