Capability for Science of the Future: Ultrafast Spectroscopy Laser Centre at Sheffield, USLS

未来科学的能力：谢菲尔德大学超快光谱激光中心

• 批准号: EP/L022613/1
• 负责人: Julia Weinstein
• 金额: $ 22.34万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FL022613%2F1
• 关键词: Capability; Science; Future; Ultrafast; Spectroscopy

We propose to build an ultrafast laser spectroscopy system which, by exploiting modern technological advances, will allow us to examine in many different ways what happens to molecules and materials after they absorb light, both immediately after absorption and then the longer-term consequences.The interaction of light with matter is one of the most important areas in modern science. It underpins the emerging technology of new photonics-based materials that can be used in the communications, computing, displays and lighting devices of the future; the economic impact of this technology sector in the short-to-medium term is predicted to be very large. Interaction of light with matter is also the basis of the conversion of sunlight into energy by photosynthesis - which is fundamental to life on earth. Natural photosynthesis is quite well understood and is sufficiently effective for Nature's needs: the goal now is to build artificial systems that mimic the key properties of natural photosynthetic systems so that we can, finally, harvest sunlight as an energy source and make a major contribution to mankind's long-term sustainable energy generation that is not fossil-fuel dependent and is not polluting. The tasks of artificial photosynthesis are extensive: not only do we need to construct molecular systems or materials that can capture light effectively, but they need to be able to use it to either generate energy directly (e.g. as electricity in photovoltaic cells), or to drive chemical reactions that provide 'stored energy' as a solar fuel (e.g. by providing energy for conversion of the waste-product CO2 to the fuel methanol).All research in light/matter interactions - whether it is directed at understanding nature, harnessing energy, or constructing new optical communications devices - requires the ability to measure the extremely fast changes that occur in molecules and materials immediately after light is absorbed. The initial changes take place on a timescale of femtoseconds and may involve movement of electron density, or changes in bond vibrations, which can be detected. Subsequent to this the captured energy 'flows' through the molecular assembly or material, and this movement of charge or energy from place to place - which can occur on timescales from picoseconds to microseconds - can again be visualized in detail. Finally any subsequent chemical changes that may occur on timescales as slow as milliseconds will be visualized. The result will be the ability to monitor exactly what happens in materials and molecular assemblies once the photon of light is absorbed; as the energy or an electron subsequently moves through the material and/or results in structural changes; and as the energy is finally used in various ways from luminescence to triggering chemical reactions.The facility that we will build will be unique in the UK university system as it will combine diverse aspects of ultrafast spectroscopy in a single, integrated facility which will enable the most comprehensive set of measurements possible at a single site with a single sample. The facility will combine a wide range of timescales that can be measured (all events from femtoseconds to milliseconds, which spans 11 orders of magnitude); a continuous spectrum of energies from low-energy vibrations to high-energy electronic transitions; and a wide range of interrogation techniques that allow changes in structure and electronic properties to be probed in real time. This will provide researchers both in Sheffield and the wider UK community - with whom the facility will be shared, by creating an "ultrafast hub" - access to a state-of-the-art tools for studying light-matter interactions. This will facilitate a wide range of science in areas of national importance and potentially benefit society from technological developments (such as new photonics-based materials and devices) and from cleaner and cheaper energy generation using sunlight.

我们建议建立一个超快激光光谱系统，利用现代技术的进步，使我们能够以多种不同的方式研究分子和材料吸收光后发生的变化，包括吸收后的立即变化和长期变化。光与物质的相互作用是现代科学中最重要的领域之一。它支撑了可用于未来通信、计算、显示和照明设备的新型光子学材料的新兴技术;预计这一技术部门在中短期内的经济影响将非常大。光与物质的相互作用也是通过光合作用将阳光转化为能量的基础-这是地球上生命的基础。自然光合作用已经被很好地理解，并且足以满足大自然的需要：现在的目标是建立模仿自然光合系统关键特性的人工系统，以便我们最终能够收获阳光作为能源，并为人类长期可持续能源生产做出重大贡献，而不是依赖化石燃料，也不是污染。人工光合作用的任务是广泛的：我们不仅需要构建能够有效捕获光的分子系统或材料，而且还需要能够利用光直接产生能量，（例如光伏电池中的电），或者驱动化学反应，提供“储存能量”作为太阳能燃料（例如，通过提供能量以将废物产物CO2转化为燃料甲醇）。光/物质相互作用的所有研究-无论是针对理解自然，利用能源，或构建新的光通信设备-需要能够测量光被吸收后分子和材料中立即发生的极快变化。最初的变化发生在飞秒的时间尺度上，可能涉及电子密度的移动，或者可以检测到的键振动的变化。在此之后，捕获的能量“流过”分子组件或材料，并且电荷或能量从一个地方到另一个地方的这种移动-可以在皮秒到微秒的时间尺度上发生-可以再次详细可视化。最后，任何可能在毫秒级缓慢发生的后续化学变化都将可视化。其结果将是能够准确监测一旦光子被吸收，材料和分子组件中发生的情况;随着能量或电子随后穿过材料和/或导致结构变化;随着能量最终以各种方式被使用，从发光到引发化学反应。我们将建造的设施将在英国大学系统中独一无二，因为它将联合收割机在一个单一的，集成的设施，这将使最全面的一套测量可能在一个单一的网站与一个单一的样品超快光谱的不同方面。该设施将结合联合收割机广泛的时间尺度，可以测量（从飞秒到毫秒，跨越11个数量级的所有事件）;从低能振动到高能电子跃迁的连续能量谱;以及广泛的询问技术，允许在真实的时间内探测结构和电子特性的变化。这将为谢菲尔德和更广泛的英国社区的研究人员提供研究光物质相互作用的最先进的工具。这将促进国家重要领域的广泛科学，并可能使社会受益于技术发展（如基于光子学的新材料和设备）以及利用太阳光产生更清洁和更便宜的能源。

项目成果

Directly Coupled Versus Spectator Linkers on Diimine PtII Acetylides-Change the Structure, Keep the Function?

二亚胺 PtII 乙酰化物上的直接偶联与旁观连接基 - 改变结构，保留功能？

• DOI: 10.1002/chem.201703989
• 发表时间: 2017
• 期刊: Chemistry (Weinheim an der Bergstrasse, Germany)
• 作者: Archer SA

A dinuclear ruthenium(ii) phototherapeutic that targets duplex and quadruplex DNA

• DOI: 10.1039/c8sc05084h
• 发表时间: 2019-03-28
• 期刊: CHEMICAL SCIENCE
• 影响因子: 8.4
• 作者: Archer, Stuart A.;Raza, Ahtasham;Thomas, James A.
• 通讯作者: Thomas, James A.

Optical excitation processes: general discussion.

光激发过程：一般讨论。

• DOI: 10.1039/d2fd90037h
• 发表时间: 2022
• 期刊: Faraday discussions
• 影响因子: 3.4
• 作者: Appleby M

Spin statistics for triplet-triplet annihilation upconversion: exchange coupling, intermolecular orientation and reverse intersystem crossing

三重态-三重态湮灭上转换的自旋统计：交换耦合、分子间取向和反向系间窜越

• DOI: 10.33774/chemrxiv-2021-w2bfz
• 发表时间: 2021
• 作者: Bossanyi D

A stronger acceptor decreases the rates of charge transfer: ultrafast dynamics and on/off switching of charge separation in organometallic donor-bridge-acceptor systems.

• DOI: 10.1039/d2sc06409j
• 发表时间: 2023-10-25
• 期刊: Chemical science
• 影响因子: 8.4