PEG linkers, or polyethylene glycol linkers, are molecules used in chemical synthesis for linking two molecules or for attaching molecules to a solid support. In organic chemistry, linkers are often used in the synthesis of organic molecules, to add functionality or to increase the stability of the product.PEG linkers are commonly used because they are relatively inert, and they can be easily synthesized and used in a variety of syntheses.The most common type of PEG linker is the linear type, which consists of a polyethylene glycol chain of varying lengths. These linkers can be attached to molecules through a variety of methods, including the use of aldehyde or thiol functionalities. The linker can also be attached to a solid support such as a silica gel or polystyrene resin.PEG linkers are also used in bioconjugation. These linkers are used to attach molecules to a surface, such as a cell or a protein. They are also used to attach molecules to antibodies, which can then be used in diagnostic tests or to target drugs to specific cells. In addition,PEG linkers can be used to attach molecules to nanoparticles, for use in drug delivery.PEG linkers can also be used in the synthesis of peptides. These linkers are used to attach amino acids or other peptide building blocks to a solid support, such as a resin. This allows for the synthesis of peptides in a more efficient and cost-effective manner.The use of PEG linkers offers several advantages to synthetic chemists. They are relatively inert, and therefore can be used in a wide variety of reactions. In addition, they are relatively easy to synthesize and can be used in a variety of syntheses. Furthermore, they can be used in a variety of bioconjugations and peptide syntheses.Overall, PEG linkers are an important tool in chemical synthesis. They are relatively inert and can be used in a variety of syntheses and bioconjugations. Furthermore, they are relatively easy to synthesize and use in a variety of applications. As such, PEG linkers are an important tool for synthetic chemists and biotechnologists alike.