IF 1.4 4区化学

Chimia Pub Date : 2026-08-19 DOI: 10.2533/chimia.2026.479

Jean Behaghel de Bueren, Jeremy S Luterbacher

{"title":"Lignin Valorization and the Opportunities of Retaining its Natural Structure.","authors":"Jean Behaghel de Bueren, Jeremy S Luterbacher","doi":"10.2533/chimia.2026.479","DOIUrl":"https://doi.org/10.2533/chimia.2026.479","url":null,"abstract":"The chemical industry's dependence on fossil carbon increasingly raises major sustainability concerns. Lignocellulosic biomass is a promising alternative resource, but it has been historically difficult to valorize to chemicals, especially in a way that is economically profitable. The lignin fraction has been particularly challenging to use even though it is nature's largest source of aromatic functionality, notably because conventional lignin extraction methods cause severe condensation, limiting subsequent depolymerization and functionalization. Recent lignin-first technologies address these challenges through active lignin stabilization during fractionation, enabling the high-yield production of oxygenated aromatic monomers. This review summarizes strategies for preserving native lignin structures and explores their conversion into chemicals, polymers, and bioactive molecules. We emphasize emerging opportunities to leverage lignin's intrinsic functionalities to enhance atom economy, reaction efficiency, and final product safety and performance. We suggest that leveraging natural functionality leads to these benefits, which go beyond simple circularity, and could ultimately push and enable adoption of this more sustainable feedstock in the chemical industry.","PeriodicalId":9957,"journal":{"name":"Chimia","volume":"80 7-8","pages":"479-486"},"PeriodicalIF":1.4,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148807861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raman Optical Activity (ROA) as an Emerging Standard in Molecular Chirality Measurements - A Perspective. 拉曼旋光活性（ROA）作为分子手性测量新标准的研究进展。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.401

Carin R Lightner

引用次数: 0

Shining Light on Chiral Monolayer-protected Metal Clusters. 手性单层保护金属团簇的研究。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.385

Thomas Bürgi

引用次数: 0

Editorial. 社论。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.353

Malte Oppermann

引用次数: 0

When Chiral Molecular Design Shapes Light-Matter Interactions. 当手性分子设计塑造光-物质相互作用。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.356

Bibiana Fabri, Nidal Saleh, Jérôme Lacour

引用次数: 0

Molecular Chirality: From Structure to the Quantum Dynamics of Tunnelling, Parity Violation, a Molecular Quantum Switch and the Possible Astrophysical Detection of Homochirality as a Signature of Extraterrestrial Life. 分子手性：从结构到隧穿的量子动力学，宇称违反，分子量子开关和可能的天体物理检测作为外星生命的标志。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.389

Martin Quack, Gunther Wichmann

{"title":"Molecular Chirality: From Structure to the Quantum Dynamics of Tunnelling, Parity Violation, a Molecular Quantum Switch and the Possible Astrophysical Detection of Homochirality as a Signature of Extraterrestrial Life.","authors":"Martin Quack, Gunther Wichmann","doi":"10.2533/chimia.2026.389","DOIUrl":"https://doi.org/10.2533/chimia.2026.389","url":null,"abstract":"We briefly review the development of fundamental concepts in the current theory and experiments on molecular chirality, including the small effects arising from parity violating weak nuclear interaction. After a short summary of the history of theory and experiments in this field, we discuss the five basic hypotheses on the structure of chiral molecules. One of these introduces parity violation as the dominant effect in isolated molecules. We then provide a brief description of current experiments for measuring the parity violating energy difference ΔpvE between the ground states of enantiomers of chiral molecules by an approach which can also be used for the construction of a molecular quantum switch and for testing other hypotheses of molecular chirality. We finally introduce the long-standing open question of the origin of biomolecular homochirality. We stress the important distinction between hypotheses postulating a selection either by a 'de facto' (chance) or by a 'de lege' mechanism (necessity because of parity violation). This leads to the recent astrophysical detection of chiral molecules in the interstellar medium as a basis for a future possible spectroscopic detection of extra-terrestrial and exoplanetary homochirality as a signature of life.","PeriodicalId":9957,"journal":{"name":"Chimia","volume":"80 6","pages":"389-400"},"PeriodicalIF":1.4,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148338238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Insights into Circularly Polarized Luminescence from Chromium(III) Spin-Flip Emitters. 铬（III）自旋翻转发射体圆极化发光的新见解。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.371

Juan-Ramón Jiménez, Claude Piguet

引用次数: 0

Femto- and Attosecond Spectroscopy of Chiral Molecules. 手性分子的飞秒和阿秒光谱学。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.364

Denitsa Baykusheva, Vit Svoboda, Max D J Waters, Chung Sum Leung, Jiabao Ji, Meng Han, Hans Jakob Wörner

{"title":"Femto- and Attosecond Spectroscopy of Chiral Molecules.","authors":"Denitsa Baykusheva, Vit Svoboda, Max D J Waters, Chung Sum Leung, Jiabao Ji, Meng Han, Hans Jakob Wörner","doi":"10.2533/chimia.2026.364","DOIUrl":"https://doi.org/10.2533/chimia.2026.364","url":null,"abstract":"The capability of generating attosecond (10-18s) pulses of light in the extreme-ultraviolet domain through high-harmonic generation (HHG) has opened a broad range of possibilities in studying the fastest dynamics in matter. Notably, the creation of light pulses with tailored, time-dependent polarization states has opened a new window into the most fundamental structural and electronic dynamics underlying molecular chirality. This article reviews the work of our group on three forms of chiroptical spectroscopy: (i) high-harmonic spectroscopy with tailored light fields, which has achieved a ~13% dichroism effect in discrimination of enantiomers and the chirality-sensitive observation of a dissociative reaction, (ii) femtosecond time-resolved photoelectron circular dichroism (PECD), applied to resolve the photodissociation dynamics of two chiral molecules and (iii) the development of circularly polarized attosecond pulse trains, applied to coherently control PECD on the attosecond timescale and measure chirality-sensitive attosecond photoionization delays. These methods advance chiroptical spectroscopy to the attosecond timescale and open new perspectives for probing and controlling molecular chirality on electronic timescales.","PeriodicalId":9957,"journal":{"name":"Chimia","volume":"80 6","pages":"364-370"},"PeriodicalIF":1.4,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148338118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How Much Chirality is Enough? 多少手性才足够？

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.405

Michel Rickhaus, Tomáš Šolomek, Michal Juríček

{"title":"How Much Chirality is Enough?","authors":"Michel Rickhaus, Tomáš Šolomek, Michal Juríček","doi":"10.2533/chimia.2026.405","DOIUrl":"https://doi.org/10.2533/chimia.2026.405","url":null,"abstract":"Chirality is often discussed in chemistry as if it were a matter of degree: molecules are described as 'more' or 'less' chiral depending on the number of stereogenic elements, the magnitude of helical twist, or the extent of structural distortion. From a mathematical perspective, however, chirality is strictly binary-a structure is either superimposable on its mirror image or it is not. This apparent contradiction reflects a deeper issue: the classifications commonly used in chemistry obscure a more fundamental distinction. In this Perspective, we revisit molecular chirality through the lens of geometry and topology. We demonstrate that the vast majority of familiar stereochemical motifs-classified as central, axial, planar, or helical chirality-are topologically trivial and belong to a single class in which enantiomers are interconvertible by continuous deformation of the molecular geometry, without bond breaking. But there exists a fundamentally distinct class: topologically chiral molecules, such as certain interlocked and knotted architectures, whose enantiomers cannot be interconverted by any continuous deformation, even under the assumption of complete conformational flexibility. Viewed from this perspective, while some classification remains useful, extensive classification risks adding unnecessary complexity without improving our understanding of how chirality functions in practice. What ultimately matters to chemists is identifying the conditions under which chirality can be observed, preserved, and used. This Perspective does not aim to provide a comprehensive, mathematically rigorous unification of stereochemical classes, but rather to illustrate, through selected model systems, the relationship between topological chirality and classical, rigidly chiral frameworks.","PeriodicalId":9957,"journal":{"name":"Chimia","volume":"80 6","pages":"405-410"},"PeriodicalIF":1.4,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148338241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spin Depolarization Mechanisms in Halide Perovskite Semiconductors. 卤化物钙钛矿半导体中的自旋退极化机制。

IF 1.4 4区化学

Chimia Pub Date : 2026-06-24 DOI: 10.2533/chimia.2026.378

Huygen J Jöbsis, Sascha Feldmann

引用次数: 0

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