关于火化遗骸的发光:热处理人骨的长寿命绿色光致发光。

IF 2.7 3区 化学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Photochemical & Photobiological Sciences Pub Date : 2024-09-01 Epub Date: 2024-09-02 DOI:10.1007/s43630-024-00618-2
Emma Schut, Ronald M P Breedijk, Michiel F Hilbers, Mark A Hink, Tristan Krap, Maurice C G Aalders, René M Williams
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引用次数: 0

摘要

人类骨骼(短时间加热至 600 °C)的长效绿色荧光归因于碳量子点材料(源自胶原蛋白)被无机基质(源自骨磷灰石)包裹和保护,并且在(健康)人类骨骼的致密刚性和结晶部分更为强烈。胶原蛋白与磷灰石的强烈相互作用(分解后)为发光中心提供了一个无机保护环境,从而使碳(量子)点状材料在室温下发出长寿命的三重基发射,并在 550 至 650 °C 之间具有抗氧化性。石墨黑相(在 400 ℃ 左右加热时获得)是发光碳基材料的前体,与结晶无机基质相互作用强烈。对加热至 600 °C 的人体骨骼样本进行了稳态和时间分辨光谱分析。激发-发射矩阵(EEM)发光光谱显示了广泛的激发和发射波长范围,表明这是一个具有广泛发射态密度的异质系统。低温稳态发光光谱法研究了低温对热处理骨的影响。将骨冷却到 80 K 会导致总发射强度略有增加,光谱的红色部分强度也会增加,这与无机基质中显示发光电荷重组的缺陷态模型不符。用光学多通道分析仪(OMA)和时间相关单光子计数器(TCSPC)对这些样品进行的时间分辨光谱分析表明,衰变可与多指数衰变模型和二阶衰变动力学相匹配。共聚焦显微镜显示了骨和高强度快速衰变区域的独特(胶合板型)结构,以及绿色和(较少)红色发射物种的空间异质性分布。ATTO 565 染料的使用通过化学吸附作用帮助了骨结构的可视化。从概念上讲,我们对数据的解释与之前材料科学领域关于发光粉末的报告一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

On the glow of cremated remains: long-lived green photo-luminescence of heat-treated human bones.

On the glow of cremated remains: long-lived green photo-luminescence of heat-treated human bones.

The long-lived green luminescence of human bone (that has been heated to 600 °C for a short duration) is attributed to a carbon quantum dot material (derived from collagen) encapsulated and protected by an inorganic matrix (derived from bone apatite) and is more intense in dense rigid and crystalline parts of (healthy) human bones. The strong collagen-apatite interaction results (upon decomposition) in a protective inorganic environment of the luminescent centers allowing long-lived triplet-based emission of a carbon (quantum) dot-like material at room temperature, as well as resilience against oxidation between 550 and 650 °C. The graphitic black phase (obtained upon heating around 400 °C) is a precursor to the luminescent carbon-based material, that is strongly interacting with the crystalline inorganic matrix. Human bone samples that have been heated to 600 °C were subjected to steady-state and time-resolved spectroscopy. Excitation-emission matrix (EEM) luminescence spectroscopy revealed a broad range of excitation and emission wavelengths, indicating a heterogeneous system with a broad density of emissive states. The effect of low temperature on the heat-treated bone was studied with Cryogenic Steady State Luminescence Spectroscopy. Cooling the bone to 80 K leads to a slight increase in total emission intensity as well as an intensity increase towards to red part of the spectrum, incompatible with a defect state model displaying luminescent charge recombination in the inorganic matrix. Time-resolved spectroscopy with an Optical Multichannel Analyzer (OMA) and Time Correlated Single Photon Counting (TCSPC) of these samples showed that the decay could be fitted with a multi-exponential decay model as well as with second-order decay kinetics. Confocal Microscopy revealed distinct (plywood type) structures in the bone and high intensity-fast decay areas as well as a spatially heterogeneous distribution of green and (fewer) red emissive species. The use of the ATTO 565 dye aided in bone-structure visualization by chemical adsorption. Conceptually our data interpretation corresponds to previous reports from the material science field on luminescent powders.

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来源期刊
Photochemical & Photobiological Sciences
Photochemical & Photobiological Sciences 生物-生化与分子生物学
CiteScore
5.60
自引率
6.50%
发文量
201
审稿时长
2.3 months
期刊介绍: A society-owned journal publishing high quality research on all aspects of photochemistry and photobiology.
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