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1. Natural organic matter composition determines the molecular nature of silver nanomaterial-NOM corona

   https://doi.org/10.1039/c8en00018b  

   Baalousha, Mohammed; Afshinnia, Kamelia; Guo, Laodong (January 2018, Environmental Science: Nano)

   Adsorption of natural organic matter (NOM) on nanomaterials (NMs) results in the formation of interfacial area between NMs and the surrounding environment (referred to as NOM-corona), giving rise to NMs' unique surface identity. This unique surface identity is determined by the ligands and their interactions with NM surfaces. Since the chemical structure and functionality is heterogeneous and polydisperse, the molecular composition of NOM-corona is the result of competitive adsorption of NOM molecules on the NM surface. Here, we investigate the molecular composition of NOM-corona formed from two different NOM samples (isolated from the Yukon River and Milwaukee River) on the surface of AgNMs using electrospray ionization-Fourier-transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR-MS). The composition of AgNM-NOM corona varied with the composition of the original NOM. In general, AgNM-NOM corona is rich with N- and S-containing compounds. Furthermore, AgNM-NOM corona is rich with compounds with high molecular weight, high unsaturation, and high number of oxygenated groups. However, CHOS (carbon, hydrogen, oxygen and sulfur) compounds adsorbed on AgNMs from the Yukon River NOM have low molecular weight (LMW) and low saturation index, which might be due to selective adsorption via chemical complexation (Ag–S). On the other hand, NOM compounds with LMW and low unsaturation or compounds containing few oxygenated groups (mainly alcohols and ethers) are preferentially maintained in solution phase. The results here provide evidence of molecular interactions between NOM and NMs, which are critical to understanding NM behavior and toxicity in natural environments. 

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2. An ultrahigh-resolution mass spectrometry index to estimate natural organic matter lability: FTICRMS organic matter molecular lability index

   https://doi.org/10.1002/rcm.7400  

   D'Andrilli, Juliana; Cooper, William T.; Foreman, Christine M.; Marshall, Alan G. (December 2015, Rapid Communications in Mass Spectrometry)
3. Organic building blocks at inorganic nanomaterial interfaces

   https://doi.org/10.1039/D1MH01294K  

   Huang, Yunping; Cohen, Theodore A.; Sperry, Breena M.; Larson, Helen; Nguyen, Hao A.; Homer, Micaela K.; Dou, Florence Y.; Jacoby, Laura M.; Cossairt, Brandi M.; Gamelin, Daniel R.; et al (January 2022, Materials Horizons)

   This tutorial review presents our perspective on designing organic molecules for the functionalization of inorganic nanomaterial surfaces, through the model of an “anchor-functionality” paradigm. This “anchor-functionality” paradigm is a streamlined design strategy developed from a comprehensive range of materials ( e.g. , lead halide perovskites, II–VI semiconductors, III–V semiconductors, metal oxides, diamonds, carbon dots, silicon, etc. ) and applications ( e.g. , light-emitting diodes, photovoltaics, lasers, photonic cavities, photocatalysis, fluorescence imaging, photo dynamic therapy, drug delivery, etc. ). The structure of this organic interface modifier comprises two key components: anchor groups binding to inorganic surfaces and functional groups that optimize their performance in specific applications. To help readers better understand and utilize this approach, the roles of different anchor groups and different functional groups are discussed and explained through their interactions with inorganic materials and external environments. 

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4. Photochemically-Assisted Manganese Oxidation in the Presence of Natural Organic Matter

   Skurie, Charlie; Gao, Zhenwei; Jun, Young-Shin (December 2020, Undergraduate Research Symposium, Washington University)

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5. A metal organic framework-ultrafiltration hybrid system for removing selected pharmaceuticals and natural organic matter

   https://doi.org/10.1016/j.cej.2019.122920  

   Kim, Sewoon; Muñoz-Senmache, Juan C.; Jun, Byung-Moon; Park, Chang Min; Jang, Am; Yu, Miao; Hernández-Maldonado, Arturo J.; Yoon, Yeomin (February 2020, Chemical Engineering Journal)